Up grades and retro grades to my 29.5

[Twille]

I am getting ready to do some work on my 94 29.5.
Has any one put an ac I unit in. Where, what kind, how big , where did you put the ducting etc.
Has anyone put a ref unit in the cooler.
Has anyone replaced the forward sky light -- where did you get the replacement lens.

Thanks for your help and experiance.
Tom