That looks like a Midwest Aerostar. With the horizontal stab on the bottom of the fuselage like that you will find if you fly from grass or dirt it will get beat up fairly quickly. I would recommend using the skids personally. My old one with a heavier old school engine still needed a little weight up front. They were designed when engines weighed more so adding weight is not unusual. First get the radio gear as far forward as possible then add weight as necessary.