That is what I'm trying to decide. The Mig 29 V2 flew like it was on rails but would also roll, loop, flip, high alpha the works. II'mbuilding 3 but a twin motor would reduce me to 2. Not a no but decisions to be made. I have two of the standard 2200 kv motors and my trusty old micro jet V3. I.also have a mega ized motor coming from hobby king to replace the one that burned up. I will check your thread onthe twin motor option.
Not if you build your motor mounts like Airflow does, all interchangeable and held in with zip ties, easy swap over.