If you can hang on a while until I get home, which due to unforeseen circumstances will now not be until thursday week, I'm going to put an Element M105 spring into Tatiana my AK-47S w/ stock TM internals, so I'll be able to tell you exactly what's what. I suspect however that the TM motor will pull an M100 Spring just fine, but I spose it depends on what you mean by "zippy".
In the fullness of medium term time the plan is:
Modify Hybrid 6.03x455mm TBB
RA-Tech Hop Up Stability (Cushion) General Type (nub)
Prometheus Purple Soft Rubber
Element ali nozzle
Matrix double O-ring ali piston head
ICS 14 steel tooth ali piston
SHS stainless steel Type 3 cylinder
SHS stainless steel spring guide
SHS 16:1 Gears
ICS Turbo 3000 motor
Gate Electronics PicoAB MOSFET
Modify silver plated low resistance wire
9.9V LiFe (depending on finding one the right shape)
The TBB will push FPS up to around 370-5 with a 105 spring, so I will probably drop to an Element M95 to squeak in at 345-50, but maybe a 100. I will soon have access to Lonex parts at favourable prices though, so I may go with some of their stuff, depending on how good it turns out to be.
In the fullness of longterm time my plan is to use BTC Chimera MOSFET's* and Turnigy Nano-Tech 11.1V LiPo's in all my guns, for the fastest trigger response available (pre-cocked) and the ability to program the ROF down to a sensible cycle speed for use with midcaps, such as 16rps.
*but at £90 a pop, this will take some time to come to fruition, especially since there is at least 1 gun ahead of Tatiana in the queue, and I may sell the gun before then.