The model with have a 12mm Hyperion inrunner powered GWS EDF40 fan. I'm keeping it as light as possible with 1/32" sheet, given it's not terribly powerful. Most of the EDF guys lose interest if you don't make it a brick heavy racer with a powerful fan
but I like slightly slower flying models that are a bit easier to fly/launch/land. I finally took some video of a little ME262 recently that I built almost 10 years ago, with little GWS 30mm fans, back when the 12mm Feigao was about all that was available, and required mounting a new hub in the fan. One of these days I'll have to build one of the little Guillow's jets with a 30mm EDF.
https://www.youtube.com/watch?v=Fvzs9kG1QeAThe small models are fussy, given the precision they require. They won't let you get away with anything. I can remember learning that the hard way, with some of my previous builds. On the other hand, the little Guillows Cub and the smaller Sterling Fokker D8 have proven to be some of the easiest, stable flying models I've flown. I almost can say I prefer the D8, which is generally considered a bit more difficult of a subject. I spent a good bit of time on the parasol wing setting and stab setting on the model. It's quite likely that a mere 1mm change would make the model fly like crap.