To clarify...the TKO "special bearings' are steel. Ceramic will not help. Adam Drake runs our bearings and typically gets 4 to 5 gallons on them.
When you finish assembling to check for play rap the clutch bell towards the engine with a screwdriver handle..piece of wood etc. and see if the play increases. Sometimes the entire assembly needs to be seated first. We have seen this numerous times with the Losi.