Webley Stingray Stripdown Guide?

My mate has a Webley Stingray, a Turkish built one and he always complains how noisy and rough it is. I've offered to have a look at it for him, give it a bit of a tune and hopefully make it a better gun.
From what I've heard all the internals are there but they are not as well finished as the old British ones used to be. I have even been told they have the power lock spring (same as a Venom spring I think?).

Does anyone have any tips on the strip down and rebuild? Anything to look out for etc etc.
Any help would be much appreciated, thanks.

Ian

Alrite mate
i have the same rifle they are easy to strip down they are the same as the hatsan 60 but with the better spring ive had 2 of these turkish ones now and both were well under powered putting out around 9.7 fpe so intsted of sending bk the second one i just striped and tuned it and added a small pre load to the spring the only thing i would watch out for is the safty catch i just taped mine up before removeing it and there is no pre load on the spring soi wouldent worry to much about a compressor i hope that has helped a little bit
dan

Cheers Dan, I'll be having a go soon I reckon