Snowpeak P22

[thirdwheel]

Our club has just picked up a second hand Snowpeak P22 "target pistol" it looks very much like a LP10 on the outside but inside it does not but it all seems to work well. I've had the trigger mechanism it to bits to work out what adjustment screw does what as it was under 500g. Now I've found what screw does what, so I now know I need a firmer first stage spring to get it into the ball park area for adjustment but it will be a suck it and see jobbie. Anyone had a similar problem and cured it?
Cocking mechanism felt gritty but now ok after using some moly and the trigger, shear let of is not bad at all, which is very surprising as I normally compete with a K12 and Titanium.

Update, I've brought the trigger up to 500g by using a spring out of a ball point pen of all things trigger not bad and feels better than the club Tesro pistol, but strangely it has the after pulse similar to a LP10 that has been worked on in the sear department.