RE: Which Cub to buy, H9 or GP
I have the GP ARF Cub .40 , powered by a Saito .65. The Saito is more than sufficient and the GP Cub is a gentle flyer.
A few years ago I had a Kyosho ARF .40 Cub. It's wingspan was a little smaller than the GP offering, but it it also had "fabric" covering and the undercart was very scale, unlike the GP ARF Cub' undercart.
The Kyosho Cub had an ancient (20 rears old) Super Tigre .60 ringed 2 stroke up front and it flew the model at less than 1/2 power. I loved it. However its weakness was the horizontal stab which was easily cracked, where it joined the fuselage, by the slightest knock.
Then some low life stole the model!
The GP Cub was the replacement and I am quite happy with it. The hardware in the GP Kit is 1st class naturally, being all Great Planes stuff. The only ARF I have had where I have not had to substitute supplied components for better quality bits and pieces.