Air conditioner, roof braced

The air conditioner had caused to roof to sag by over half an inch. Interior ceiling cabinets kept popping out it's attachment screws. I used 1.5" thick wall square aluminum tube to span between the roof supports. The compressor area extends down half an inch below the rest of the a/c base, so used 1/2" x 1.5" channel around the roof opening. Foam 1/2" pipe insulation in the channel is my gasket. My local RV shop helped me lift the a/c back to the roof with their forklift. Thank you Denis RV.