I have the SA-5 and SA-7 and have the 1b ordered. These are the smoothest 3D printed models to come from Boyce-Aerospace.

My one advice to anyone is to use WHITE primer and WHITE filler putty for filling in the surfaces. If you use gray or reddish primer or filler it is hard to cover up with white paint and you have to use more paint to cover these colors up.

These are builder models. Not overnight builds and out to the field to fly.

My two cents worth.