gone through 3 know in 6 months,clips are half missing on track so it drags a little hard, but 3 of them broke , any ideas whats causing thedse,to break, i used rail ext. to long track it,dont know why but this sled always transfer and hooked hard,i bought it from bender canada and i think he put it together with varios sled parts, i think the skid was out of a 00 srx because the holes in the skid where the srx transfer rod bolts into looks like it was used at one time,also it wears the front tips off the rails i have the limiters sucked all the way in and it still transfers hard, any ideas for me