Joanmonte; it's fun to 'mess around'.
for 9 years i was in a somewhat small room (18' x 12' x 10') and for the first 5 years that i was in that room i had pieces of foam that i moved all over the room from place to place learning and experimenting to find the right balance. eventually i did find a balance that optimized the various issues. looking back it was a fun process and one i'm happy to have gone thru. in that room the music had an immersive intimacy that i loved. it has taken me a couple of years in my new larger room to find that quality that i had really valued.
enjoy the path you are on and the place you are at. large spaces have their challenges too.
and thanks for the kind comments.