Were these the older ones when they first came out? Ive heard they make a couple different ones and changed tbe design a little bit. Dont personally know anyone thats used one. I know a sure grip unit is really what i want, but i dont have one for a 60 and not gonna spend $600+ on one and totally disassemble everything. May just have to put new spiders in eventually and live with a one legger and keep using the4wd. Figured id see what all your thoughts are on the power trax