Yes you are not the first one who is running into this problem. The result was the additional
clamp_protector_0.6_loose.stl to work around the problem. 3D printers are after all
not calibrated in a way everyone can simply press the print button.
This is always the biggest problem in any design consisting of more than one part.
My guess is it's the reason why Thingverse tries to feature single printable parts.
The 3D printing world would be far more advanced with a standardization or
caliabration technic to solve the problem for all sold 3D printers.
Maybe we need some more featured designs which are dealing with this issue
so we can use the same design language here.