Hi.
My bigger friend has the same higher Attack2-13 AT demos that you now have on his 183 Laser AX. To me, those bindings, with their stand height about a cm. higher than the older Attack2-13 demos, are better, as long as I can move them forward. In terms of feel, they have a welcome combination of greater leverage and playfulness that is particularly apt for that ski. (My friend likes his from +1 to +2 - he's bigger and younger. I like mine, with a different, lower binding, from +2 to +4 for the same purposes. I like his setup mostly better than mine, because of that higher AT binding. So I suggest keeping it and using it. (If you decide you don't want it, I'd be happy to buy it from you at a reasonable price, since I've yet to find a pair myself.)
In the process of trying to duplicate his setup, I got a used pair of the lower Attack2-13 demos online, accidentally. I've never used them, because they were not the taller AT model I thought I was getting.
If you want them, I'd be happy to sell them for about what I got them for, can't recall exactly: around $105 including free shipping. (They seem to be in good condition, but are just sitting in a box.)
By the way, The 175 AX Lasers may be worth experimenting with on mount position, but they seem fine just a bit forward of the line (c. 1 cm), or on the line for a bigger guy - maybe more forward only for a smaller guy. This ski is so short and quick that a more forward position doesn't really matter much. It's the longer 183 that potentially likes farther forward.