Building pre-2k cocker

[Ecapnation]

You can use unthreaded ivg's with nelson springs. Not much of a point threading the lower tube when the option already exists and is bolt in

[Psycho91]

Ahhh ok I gotcha, should have read the comparison thread a little better 🤦

[Ecapnation]

That and the pre2k body has a countersunk hole instead of a threaded hole where the beaver tail goes... Threading the body will not allow you to have a beaver tail

[superman]

Not with out further modification, but it can be done.