Hi Graham, Both my son and I had the original Hustler and it was a great flying plane. Very well known and liked design. Most trainers had flat bottomed wings but the Hustler had a semi-symmetrical foil which handled a lot better(especially in wind) We had .40 sized glow motors in ours which made it a fair bit overpowered and gave vertical performance. I think the recommended was .25 from memory. Have fun
Cheers, Richard