1. There is thread play. 2.The correct dimensions are not observed at the location of the O-rings. 3 the sealing material to the compartment for the regulator is not suitable. 4 there is practically no sealing cone.
The angle is 48 °. there is glued paper 1200 for wet work then I glued 2500 paper,it’s a very meticulous job I used ballistol grease instead of water when polishing, it does not allow the paper to burn quickly.