mgc cartridge 44-40 long.

ok.....ive bought an mgc peacemaker with no carts.
ive seen some pictures of the carts and how they work.
ive got access to a big ass lathe.
i love making stuff.



has anybody got the dimensions of the centre pin that goes in the mgc cartridge,so as to take away the guess work on that part.
the outside body should be easy to replicate.
ive measured all the chamber and up to the point of contact with the hammer pin.
i just think that getting some actuall measurements for the centre pin will make things much easier and faster.

or......
if anyone has 1 full cartridge that they would loan or sell me that would make a massive difference and save me a lot of time.

thanks for any help guys ( and maybe gals??)