Our last few fibreglass body motorhomes had the majority of the interior components and cabinets constructed with 1x2's stapled together and a thin skin of panelling. This combined with a cheap exterior framework led to lots of stuff that rattled and fell apart. My original idea was to have all the cabinets constructed from aluminum to combat the shake, rattle and break problem. Now that I see how stout the aluminum body is going to be I may rethink my interior construction method. I'm not sure the aluminum interior framing is necessary. Any opinions?