Hi H5606,

With my limited experience running TD .049's with my friends, we found it was simpler to leave the pressure tap sealed and run pen bladders for fuel tanks. Even if you had a slight "leaker" , the engine would run consistently and make good power. You had to be careful starting the engine with a bladder or you could easily flood it or hydraulic lock it. I have an old collection of TD cranks with the crank pins missing from those fun times. Anybody have or know of a source of TD .049/.051 crankshafts?

Ah the good ol' days of half A racing !

Carlos G