Here's a thread I started comparing arm sizes. The LSTs were not any bigger, but a shape that would be a pita to deal with and make work.
So, I do have some disappointing news to report.. When I did my original width extension measurements.. I had the carrier on upside down
The carrier is offset top to bottom, so all of the increased width I was measuring was due to this. I only figured it out after I had the whole thing together and the droop was so bad. The pillow balls were bottoming out on the carrier as it wasn't designed to move that much in that direction. Doh!
So I flipped it around properly, and its actually the same exact width as the savage arms, going from outer bearing to outer bearing!
So all this work and I've just given myself different arms and a better potential steering setup, as well as proper 8mm axles. Oh wells. I always assumed this was a possibility, so I never did anything to the bulkheads that would preclude me from using the sav arms if I decided to go back.
I will go forward with it for now, and still get
some hub extenders with proper 17mm wheel nuts. My width increase over the XL width is now looking like 5mm

. Least they are good ofna adapters, and not crappy integy adapters that strip easy.