The GSX is made in a 176 for both retail and the race-stock model. Which one do you have? If you got the T model, your rep should have hooked you up with the plate that Vist makes special for Elan (it has an Elan logo on the side).
I have the spec. sheet from the Elan USA Race Dep. in front of me and the M.P. on the 176 GSX T is 740mm, measured from tail-to-tip. I hope that helps.
As for the tune, I tuned my SLXT's with 0 deg. base edge under foot and .5 deg. and the tip and tail, and 3 deg. side edge. I have never been on a ski that held so well or hooked up so early. For my GSXT's that I got a few weeks ago, I have .5 deg. underfoot tapering to 1 deg. in the tip and tail, with 5 deg. side edge. I've only used them twice in the gates so far, but their performance is better than I could have hoped for. I like them so much that I sold my 03 race-stock Fischer GS's and my retail GSX's. I snapped up a few pair of SLXT's and GSXT's already for next year because I can't see finding any other skis which will out-perform the Elans. They are that good.
You have the smoothest, most powerful GS ski on the hill. Enjoy [img]graemlins/thumbsup.gif[/img]