Funny, it just doesn't seem like it's big enough to be a gasser, next to the .40 sized ducted fan I am building it is only about 6 inches longer with the cowl on. So at first thought the 25cc seems like such a huge engine, but listening to people who have flown it, the 33 homelight seems like a good choice.

Here is mine as of today (this is about 1 days work spread over 2 days)