[folivier]

Oops, forgot about his being the Dometics. In my '93 I thought about going to a mini split when the Dometics went kaput. This was about 10-12 years ago and mini splits were just becoming popular. If the compressor would fit where the D units were then you're right the tubing and wiring is already there. The only place I could think to mount the evaporator was the upper valence where the D dumped the cold air out. Remove a section of valence and mount the evaporator there.
What about it Simon? Like Tom says: we love spending someone else's money!