yep! all typical yerf chassis failures.
Give a shout out when you are ready to fix these problems. Been there-done that. I'll save you some time. When your ready i'll post some pics to show what needs to be done, to the front and the back. You mentioned using the yerf for tight trails, the wheel base is longer than most so the turning radius sucks! The yerfs won't turn tight. the only times I wished I had reverse is on a tight trail where I couldn't manuver enough to make a turn.