Bronze06 wrote:
Luis and Herman have both pointed out that the thread pitch difference between the HPR and the main body are just slightly different and would not necessarily cause any undue problems and they are correct.
That is not what I said. I think you are also miss-quoting Herman, but I don’t want to speak for him.
All I said is that the pressure thrust (pressure force) is very low.
I do not recommend deforming threads. Brass tends to be a very forgiving material, but deforming threads is never good practice. Brass is a very ductile material, but you are still taking the risk of damaging both parts.
The thread pitch is 27 TPI vs 24 TPI; that is over 12% difference. That is not "just slightly different".
Some of the damage may not be immediately obvious. For example: if you screw-up the alignment (causing a slight tilt), the seat will probably still create a good seal, but it may require more force than necessary and add to the seat imprint.
I realize that this is the internet, but just because you were successful (due to either skill or luck), I would be careful about recommending to others to try deforming parts without some warnings.
Any modifications of this type you do at your own risk.
YMMV