RE: Ercoupe kit
I have to second Bassman on the Stafford kits.
My personal experience with them is as follows:
You will need to re-engineer various parts/sections of the plane to get everything to work.
It is a 'builders' kit in that many things are not covered in the instructions OR adequately on the plans.
The quality of wood 'leaves something to be desired'. With a significant number of pieces you would probably be better off replacing the part. That way the quality of the wood and the "quality" of the cutting would be substantially improved.
However, when (if ) completed, they fly well.
In the kit I did (Rearwin Speedster ) I had to relocate the firewall rearward in order to get an OS 46FX to fit. Two of the primary fuselage formers had to be severly 'hogged' out in order to fit an 8oz fuel tank (wound up leaving 1/8" - 3/16" on the fuselage formers just to get the tank in ), the fuel tank HAD to be built in, the fuselage strut mounting was never addressed in the instructions and only shown in one view of the plans. There were numerous other minor 'difficulties' with this kit.
All in all, while their kits look nice and they do have a nice selection of aircraft models, I can not recommend them. In my opinion they are more trouble than they are worth. I find that doing a model from scratch is (in many cases ) easier than doing a Stafford kit.