I noticed alot of pros string in the mid 50s for midsized racquets (with polys, mostly Luxilon). They all get theirs strung on electric machines. There was a post about people stringing higher compared to pros, i think this may explain some of it. I currently use Gamma TNT and Durablast at 60 lbs (friends Neos 1000). I want to try luxilon. What should i string it at on an electric machine? 50 lbs?