has anbody used one of these? i have put a lot of pole springs in but i have never struggled as much as i have with this one. i spent about 6 hours trying to get it in, finaly i figured it was just imposible and the spring was designed wrong. i ground down the L shape at the bottom to a straight edge. and then it went in fine with no problems and works great. i'm just wondering if anbody ever succesfully put the blowsion spring in without modifying it?