real nice looking work u appear to have some carpentry skills mine was sorta like that but have started usin silver sided celotex sheet insulation if no weight bearing is required.its easy to cut light and relativly strong add some silver tape and u gotta box. celotex about 12.00 a sheet and it doesnt need painting.got tired of sawdust and heavy wood.anyway im a nube and trying for a grow as nice as yours.thanx for the pics