thanks for all the replies guys, I don't ever plan on hitting a 171.X anytime soon :P , and I appreciate the feedback, only because its a learning experience!

 

i dont think kevlar or composite cone will get anywhere past 165bd in any design with those subs as they may all break at the same point one way or another , if it doesnt happen there then another problem will accure inside the sub. Just my 2 pennies

 

Nice !.. (I luv pictures )