Josey is right. I've been flying a DA-50 in a WH Edge since August. I have about 6.5 gallons thru it now. All I did was mount it securely, using medium lock tite on the bolts thru the firewall, burn Lawn Boy ashless or equivalent for the first 4 gallons or so, and be sure to use lock washers and the muffler brace when mounting the muffler. DO NOT use LI PO batteries for the ignition without a regulator. I've heard of people using as little as 1250 MAH nicad or NiMh batteries for the ignition. Dont worry about the weight and use a larger battery, say, 1800 minimum. The last thing you need is an engine to quit at the wrong time due to dead ign. battery. As far as that goes, go ahead and make sure to use heavy duty switches with built in charge connectors. That way, you can get into the habit of checking both the ign and rec batteries every couple of flights with a digital vtm with a load button, such as the Hangar 9 that I use.

Also, on the airframe, keep the extra vibration of the gas engine in mind. Use lock tite or at least lock washers or self locking nuts everywhere on the airframe. Be sure to "harden" the servo screw holes with thin CA before running in your servo screws. Treat every nut and bolt as if its going to fall out without extra attention. Servo horn screws, mounting screws, landing gear nuts and bolts, etc. Once you've flown and checked these after every flight for 5 or so, you'll know what to pay more attention to or not worry about. In my case, I was a little suprised at first with the difference between the gasser and the glow planes as far as things staying tight.

I had a couple of things come loose on the first taxi, and corrected them in time. Also had the engine mount bolts loosen a bit on the first few flights. Have lock washers and medium lock tite now and six gallons later, no issues.

Just pay attention to what Tom says at WH, and also the DA manual. With a little care you are in for a nice, stable and enjoyable ride. I am addicted to gas now, and I'm sure you will become that way too, as long as you pay attention to a few details. BTW, the later DA-50's run fantastic. Mine is ser#365X something from early this year. No issues what ever. VERY dependable easy starts and not one in flight quit to date(closing in on 100 flights).

Tim