I try the new manuevers I learned on the sim with my foamies first as I also just started flying 3D this year. This has helped me get to the point where I no longer have to think about the inputs needed. Flying indoors leaves very little room for error which in itself will make a better pilot. And for those times when the foam meets the ceiling, wall, or floor they can be put back together relatively quick with foam safe CA and kicker. My foam planes also allow me to push myself harder and farther than I would with my larger planes. I have blown foamies completely apart only to have them back in the air in a couple hours to fly again.

As far as practicing on the sim I use a large 3D plane and fly it in the gymnasium or practice field to get accustomed to flying in confined spaces.

I noticed I now keep my larger 3D planes closer and lower than I have before. When I do get my 3D planes in those precarious positions I can react without thinking twice about the inputs needed as I have usually been there already with my foam planes.