Tracy,

Remind me of the performance of the mighty "Spintech" and its reason for rejection.

 

Thank you.

Lynn E. Hanover

 
In terms of Sound suppression and strength, the Spintech was my favorite.  Only downside was weight (13 lbs) and draggy profile when mounted below the fuselage.  It had flat surfaces but they were so well braced by the internal structure that they did not flex or 'ring' so failure was not likely.   I flew it for about 200 hours on a turbo exhaust port 13B.    I'm going to try it on the 20B after I get a few more hours on the Hushpower II.