go to wall-mart and get fifty lbs. of play sand,a box of quart sized ziploc sandwich bags and a package of mens tube socks.fill 5 or 6 sandwich bags half full of sand,seal and put in tube socks. sew ends of tube socks shut with some monofiliment fishing line and you have perfect sandbags,wrap one around each wheel and these will hold your plane nicely. out of the 50 lbs. of sand i made several sets and passed them out to other club members