HI Bob --

I have a trio of shortened AM FP-7 chassis under my Wabash Valley F shells. 
I put large coreless motors in them (they run REALLY nice) but I had trouble 
with the original Hobbytown shafts failing under load.   I replaced with K+S 
3/32” square brass tubing, never to fail again...

If you go back to flexible tubing couplings on the GP-30s, make sure you get 
the silicone tubing and not neoprene, rubber or latex.    The silicone has a 
very long lifespan...

Have fun!
Bill Winans
--------------------------------

.... The original FP-7's were built with those durable HobbyTown sets--been 
running fine from day one.

I'm going through an issue with my on again off again, gray market brass 
GP-30's.  I replaced the rubber coupling with a plastic one.  The rubber one 
had started to slip, the local RC shop sold me some fuel line and that 
wasn't any better, so I tried plastic universals but that made things worse. 
There must be a mis-alignment but I don't have the time to devote to fixing 
that right now--so be careful when you ditch the rubber (aka forgiving) 
drive connection.
Bob Werre
PhotoTraxx



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