You do have a big problem if one of your engines cuts out. The guy that built the electric version in the link above, just informed me that he crashed his on the third flight. A motor cut out on takeoff and it went in with a spiral. Took off most of the front end. One thing about these Guillows kits is that their frames are so light. You can't over stress the frame with excess weight, and being a small size, the weight and balance thing becomes very critical. You need to use the smallest of micro gear on board and more than likely a Li-poly battery to save weight.
If you do manage to get it flying with extra weight on-board, it won't take much maneuvering to break the fuselage under load. The Guillows kits were originally meant for free-flight and were designed to be built as light as possible with silk and a minimum of glue. Just some thoughts to consider. I built the Guillows Hellcat and they are great models. I also had a link to a website of someone who built a R/C version of the Guillows Hellcat. I'll see if I can find it, because he used a glow engine on his, I just can't remember which one. Good luck and keep us posted.

Jesse