Don't write that one off so quickly. The cylinder and carb look very similiar to the Toro 25 that I did recently. I removed the reed valves from the transfer ports and made a flat aluminum plate as a replacement. Make a carb adapter so you can put a normal carb on it (WA 167) and the rest is just normal weedeater conversion. I've just got 10 flights on the Toro, but it's looking like a very good engine, easy hand starts. I'll post pictures and do a report on it when I get a little more run time on it to get it broken-in a little (if the wind ever quits blowing up here)