My sympathy goes out to you mate, Ive been there more that a few times myself its not acceptable how many of these guns loose their pressure thats probably why you have to wait so long with theoben for a repair that takes minutes!!
But its not really a fix because if the guns lost pressure to start with it will more than likely happen again over time.
When you bring up these points it seems the fans jump on you with both feet on here, trouble is I too was a big fan but in the real world these guns are not low maintenance or more reliable than a spring as theoben like to boast!!
I want a self contained hunting gun again and when I look at the theoben evo carbine in walnut my heart says just go and buy one, but my head tells me to buy a hw97 and get a v mach tune
Hope you get sorted soon anyway ATB