Doesnt it also depend on the type of VPN and the providers?

Depending on the frame, the clamping force and/or weight could deform the top tube, as it is not designed to bear vertical loads

Don’t grab 'em by the top tubes 😬

I do a lot of work myself too, but there are things I go to the LBS for help. Either it requires a very specialized tool or I am too weak to remove/install some parts

Aren’t they like $50 each?

Wait till it still fails to fit my head (I am Asian)