[Advice needed - WE Hi Capa issues]

Quick update on this, I found the valve knocker sear had snapped. Just waiting on a replacement to be sent out and I can see if that solves the issue.

[Advice needed - WE Hi Capa issues]

I am in need of some advice as to what I need to purchase/do to resolve an issue with a hi-capa I have.

I have a WE 4.3 OPS Tactical which has gas efficiency issues and after firing off half a magazine, there isn't enough pressure to fully cycle the slide which I assume is causing the disconnector to not be hit and it goes 'full auto' without discharging a BB and just dumping all the gas from the magazine. I have replaced the recoil spring for a weaker spring, and changed the loading nozzle to elimate the potential of any cracks. could you point me in the right direction? Also, if you could advise as to if my RIF is compatible with TM upgrade parts?

Cheers