Hey guys,
I just got back from Kangke (I'm lucky enough to work within driving distance at lunchtime from them

I've had a problem with the tube vibrating out of my pitts muffler (I'm on my third - this one actually had a little help on a deadsick landing) and I lost the needle valve on the Tiger shark last time.
He told me I should try to plug a tube for more muffler pressure (needle valve response) and switch from a 13-8 prop to a 15-6. This seems big for a .91 but they say it needs one. What do you all think?
BTW, Kangke kicks right now. I got a new pits muffler and a complete new carburetor for FREE. That Laser 2000 is looking better and better - Or Texas Hurricane... Decisions, Decisions...
Rick