Different engraver found, waiting for quote.
Just incase anyone was having dificulty sleeping - here's what a £130 Cyma needed to be a DMR.
Gearbox casing is fine with no obvious defects, more for the ceremony than anything I've polished the rails with Mothers Aluminum polish. Who knows if it makes any difference but it makes me THINK the piston cycles better. Stock cylinder head was also fine so I've kept that and the stock cylinder in place. Unfortunately, the airseal was non-existant, I've kept the Cyma piston but changed out the piston head for a ported aluminum jobbie I had laying around. The stock nozzle wasn't great, so I splashed out on a Prometheus which seals and feeds. ASG M125 spring with a bearing spring guide coupled with a Modify 6.03 barrel if giving the desired FPS.
There was no reason to change out the gearset but a saw a deal on some standard ratio Prometheus V7 gears that I couldn't resist... Quick shim and that's all happy. Stock bushings are fine. If you remove the selctor bar from the V7 gearbox, the cut off lever cannot be lifted. This gives a clean and reversible semi only lock.
The Cyma motor wasn't great so I switched that out for an ASG Infinity 30,000. The ASG motors are a bit on the big side so a fair bit of filing had to happen to allow for proper motor height adjustment. Cabling was switched out for some decent gauge stuff and a Gate trigger cable was put in place. Currently there's a NanoHard in the stock set to no active-brake and 7.4V battery protection. Active brake was making the spring go TWANG bizarrely, but the gun doesn't require AB on a 7.4 and the trigger response is spot on.
Finally, the Cyma Hop unit was not a great casting and actually asymetrical. I got a TM unit from FireSupport and went with the obligatory ML Macaron/Omega nub route.
Fun project internally, but as usual I've spent more than the base gun on UpGrAdEs!
I still can't hit anything, but I certainly cant blame the M14