My 1977 PIK-20B fiberglass wings weigh 77.7 kg total (171 lbs). 48.6 kg (107 lbs) at spar end, 29.0 kg (64 lbs) at wing tip.
I have an IMI One Man Rigger and last week used it to rig the PIK by all by myself. It's a great back saver and allows careful and cautious wing placement instead of groaning, cursing and worrying you might drop it when rotating wing flat for insertion. Well worth the cost.
Two riggings ago I also added a small positional ramp/shim at the left side of fuselage to align the first spar with the second root. Once the first wing is in place and on the wing stand, I temporarily place two strips of tape on the right root, so it won't slide back out when the second (left) wing is inserted. Then when the second wing is aligned the two wings marry together easily with no significant force on the persuader handle.