Thanks for the comments
I have received those service kits that you put me on to and I am about to start making the Max canister valve for my next stove, I am hoping for the valve to weigh in at 10-12g next time.
3.8g was shattering actually, I spent all weekend on trying to get it below 3g, if I can find the right small o-rings I will be able to get it under the 3g target, that will allow me 2g for the windshield.
The weight is real, weighed on scientific scales 0.0001g resolution, as mentioned before I was aiming for 8g total.
I did a lot of work to get the air fuel mixing to work, I had some very good advice from Roger Caffin whom I wish to thank. This stove while it is usable and I hope to use it on a walk soon is too light to be practical, I will have to be treated very carefully, my next stove/pot stand/valve will be much more robust.