Dave: I beefed up the HL Sr. Telemaster, especially in the area of the wooden engine mounts (I think they designed it for electric). First of all, I pinned the mounts with thin, long wood screws and thick toothpicks, both in front and in back of the firewall. Then I got some aluminum stock and made braces, very similar to the way the Great Planes Giant Big Stik comes in the box. This makes the entire engine area very much sturdier and LESS WORRISOME for me!!!! Everything fit easily, the throttle servo, the ignition module, the ignition battery, etc. I moved the fuel tank back towards the CG. Power is great, even at 5,000 feet. I have yet to shot any video with it, but will bably be doing so in the Spring. I have had some health problems, and have also been trying to sell my stable business, land, and house, and this takes a LOT of time. Roger