Yeah it will work but I am struggling to see where your going with this build (other than the boneyard).
The A1 while classed as a balance motor is still pretty quick, couple that with a 10.44 siegetek set its going to very quick. Then your using a high power spring? Your going to get issues, it will strip pistons a lot. If it pre-engages even if using a full metal tooth piston then the siegetek gears will eat the piston.
High speed and high power rarely works with much reliability.
Edit; Siegetek gears are kind of pointless I have a couple of sets and to be honest they are overkill. Lonex gears cost a lot less and perform just as well.