I've got the Rainsong OM - no electronics because I wanted to be able to play it in the rain or drizzle if necessary. Too much heat is still a problem, I believe due to the glue, but the guys at Rainsong would be able to tell you. Temp and humidity changes though are what it's good at!!
Here's the size of mine, in the softcase, so maybe this will help you tell if it will fit:
Length: 45"
Width: 18"
Depth: 8"
Best,
Phil
