I blew out the black and red indicator assay tip on my heavily modified HDX68 and now the gas bleed valve won't stay in place. It is as if that one part held the whole thing together. I can't use parts from my side by side as though they look exactly the same, the gas chamber is deeper so it just falls in. For the damn life of my I cannot find spare parts anywhere. I was thinking of fabricating something but I'm not sure. I modified it and I am pretty sure it is shooting over, well... way over 40 joules. anyone have any ideas where I might find any of these parts in the US? And the damn screws... they don't last too long and strip out after a single disassembly. Are these just hard to find but standard screws or are the completely custom to umarex. any ideas would be appreciated.