Your a fortnight to late in afraid
Currently bed bound , can't stand, sit, walk let'alone even "get" to my workshop to do anything
I know the gun very well. I've one sitting resealed for a gun shop here.
There a simple AND hard gun to fix, I know the exact seal that had failed but it can be a bugger to get too, and it could also need a new valve that I "used too" make
All I can say is hold on a while, send me a pm in a week or so (wish full thinking there) and hopefully I'll be mobile again,................hopefully.