Update - saga over, I'm in the blue boots. Turns our the throat of the clog is a couple mm larger than Tecnica - and that was enough. Skied a couple of days last week in CO, no issues so far. The RS 130 is a totally different deal than the OG RX130 LV (translucent orange solid lug). Much tighter fit and might actually need a bit of a grind down the line - which is very different than having to add layers of foam to the liner on the ol' orange ones in post #3 above. Thought I wouldn't like the power strap either, but I don't see any reason to swap it out for a Booster just yet.