Fortunately, with an adjustable binding, the OP or
@ScottB can adjust the mount point to find his favorite spot(s) for skiing different conditions and locations. With this particular ski, at the longer length in particular, such choice matters. Also, the 175 length of this particular ski behaves like a 180/18 cheater GS ski, in my experience: great edge, very quick from edge to edge in similar fashion. Such skis are also good in bumps. The next longer size isn't, anywhere near as much. If he's a bumper, or quick-turning on groomers, the OP might enjoy that quick 180/18 feel the shorter AX has.
With apologies to the OP,
I definitely used the Head/Tyrolia PRD 12 stand alone binding, no plate, on my 17/18 Laser AX 183. So it is on the power rail.
(On this particular binding, this time) toe 29.5 mm., heel 33 mm.
(All measurements are approximate, by whatever method(s) I've found most accurate. I've done no adjusting of the bindings to various modes or norms, so with adjustments, where possible, some of these might change a bit.)
Two previous PRD 12 Tyrolia/Heads I measured some months ago, in a shop: toe 30, heel 32/33.
(I ended up approximating my different heel measurements as between 32 and 33.)
(Others measured these also at the same time; some got the same, some got slightly different measurements than mine.)
There is also a PRD 12 MBS (Multiple Boot Standard) that Head/Tyrolia gives a single published 33.5 overall height to, no published delta included.
Also a Head/Tyrolia PRD GW, with a published single height of 35.5
A standard Attack2-13 demo binding: toe 21 heel 23
(two used versions I have measured the same, approx.)
I got the same approx. measurements off a new pair being sold retail in a ski shop, thus a third example. These were not AT versions, so that may account for your different measurements on what I gather is your Attack2-13 AT demo version,
@ScottB . Your particular version is probably a retail demo version, not the same as my friend's. (See below, next binding.) Variations on factory runs, different year or different norm models unmarked could also account for these being different from
@ScottB measurements. Also, with or without calipers, it's plain hard to figure out the best spots to take measurements from on the slanted surfaces of toe and heel, hard to fit calipers into receded, uneven, inaccessible spots, etc. And different operators will make different choices here, trying to stay consistent, at least with themselves, but harder with others at a distance. Approximations, whatever the tools or methods!
The particular Attack2-13 AT demo binding on my friend's 17/18 AX 183: toe 30 heel 32.
(Note: It's from maybe two or three years ago, at this point. It is to some degree a specialized performance shop wholesale demo binding, not a retail or a rental demo binding. [They are all different.] This model has to be a special order by a demo rental shop with leverage, and it is not generally available to sell to the public, but only, eventually, as part of a used demo package, once the demo ski is discarded and for sale used after a year or two. I found it is written into many brand-to-demo shop contracts that this binding cannot be sold stand alone retail, but only sold used as part of a used package later on. And this is standard industry practice with this whole class of bindings, across a number of brands. Some shops are exempt from such contracts because with volume they have leverage.)
There is also an Attack2-13 retail demo binding, and a retail version also that is AT now. By your measurements, this is probably the AT binding you have. These are not the same as the wholesale performance shop version my friend has. (His came from Gorsuch in Vail, and he got it because he is in the business.)
There is also an Attack2-13 GW Demo, with a 32 mm single height published. I measured a version new in a shop at toe 30, heel 32.
Again, all measurements approximate!
I suggest getting used to using the term "approximate" when measuring binding height differences, and even if there are published measurements released by the Brands themselves. (Rare.) Maybe just relax with it, work with it - find "work arounds."
I went into such detail partly to make a point: to show the kind of amazing variations in binding models, and thus one of the real obstacles to getting a firm grip on measuring binding delta specs, just to get some relaxing and forgiveness in such discussions.
By our rough count, there are some 150 to 250 new, everchanging retail binding models being sold in shops now from just the four major brands. Many have the same names but have unannounced redesigns or modifications, others are unsold last year's stock, mixed in with stock from previous years - all still getting sold out of brand warehouse inventory, and still being sold "as new" in ski shops. Still other binding models are for different specific purposes (besides all mountain: race skiing, near-race skiing, backcountry, skinning, trekking, child, junior, female, non-retail cheap demo bindings for rental/lease, non-retail more upscale demo bindings for rental and some demo, non-retail performance ski demo bindings, retail sale demo bindings, etc.) This is not counting versions no longer being sold, but everywhere on the slopes, which need knowledgeable repair and replacement at times, so might need to get measured for height also. It is not practical to use complex cut-outs or model-specific measuring aids for such a steady, ongoing stream of different, often slightly unidentified binding variations, coming into and out of shops. Instead, a quick, handy way of measuring height toe/heel differences is necessary, however faulty it might be, along with a process for dealing with approximations - and some practice with different bindings. Choose your tools and methods.
Along these lines, a bunch of us in a ski shop played with accuracy in these measurements. Without going into detail, just cutting to the chase, we realized we had to choose our tools and methods somewhat subjectively (a bit like choosing ski poles), and got used to approximations.