bjspinner,

I took the M chassis TRF's off my MO3 and fitted them directly to my MO5. I am running the following:

Front

3 hole piston
50 wt oil
Blue TRF short spring

Rear

3 hole piston
40 wt oil
Yellow TRF short spring.

I have also used TRF short yellow springs F/R and TRF short Blue TRF springs F/R. It depends on the grip levels of your track. I will in the future be trying other spring combinations with added weight to the car.

With the HW 13T BL systems we use, the light weight of the car, hinders getting enough forward traction, to accelerate hard out of the corners. Presently my car is at 1348 gms and I will be trying to bring this up to at least 1450 gms. This weight I want to place over the front for more traction and balance out the extra weight added to the rear by the relocation of the servo.

I also found building the ball diff as described was not tight enough for me so I left the three large cone washers and the two small cone washers, replaced the thrust washer with the 1150 bearing and was heaps tighter. The other way is to leave the thrust bearing and add another large cone washer.

This is just my opinion.

Regards,

Calvin.