Bruce,
  I've been reading about towing, both gliders and banners with my in progress Flyin King. Currently I have a Saito 90 purchased for it, however after the reading I would like to put something a little beefier in it, such as a Saito 120 (4-stroke). Could you recommend any specific firewall/fusilage bracing/reinforcement that would help accomodate the stresses of the 120. I was thinking that it might be possible to use 1" triangle stock epoxied to the back of the firewall to help reinforce it, and possibly even carbon fiber tape expoied to the fusulage sides. I will be using a DuBro Vibration Reducing Mount. I've also purchased carbon fiber tape to expoy onto the wing joints.

Thanks for any suggestions you can provide
Doug Brown