LMC 3 point seat belts - adjusting to work better?

[JFetter]

My 78 K10 came with just lap belts, so I have no idea what the factory 3 points were like.

But I just bought these generic ones from LMC and I'm not so sure about them...

They seem made well, but..

-They are VERY sensitive when you pull them out, have to go very slow or it will lock up

- They don't rewind worth a crap. You have to feed it back in.

My question is - Are there ways to tweak these to work better? Or should I just return them and buy another brand that works better?

Thanks!