Here's 2 of 3 designs, I've been playing with... 2a should really honk from a micro Tower i've yet to build. 3a...Well it's something to sorta think outside the box the lower motor cover is Kapton. I'm hoping it's 752 degree f rating will protect the hollow basswood nose during a micro second burn model 1a needs to be pictured yet, it's simply a quilifier model based on deformed BT-5 tube.