The Royal spitfire is alot more accurate then top flite but has some issues which cause problems. It uses a solid nose in which the engine is side mounted and is sticking out in the breeze. This does not look good but an OS AX 55 might work well. Will come out tail heavy just like every other spitfire. Quite a handful to build, Royal assumes you know how to build and supplies no aids. Plans are available on Ebay quite often and you can use a Top Flite canopy. It will build a very light airframe. In realistic terms, the Top Flite is the only real choice in a Spitfire that is available and does the job for a reasonable amount of money.