A suggestion Tony.
If you are going to stack boards with fixed connectors, PLEASE allow some means to access all 4 sides (or 6 sides) for probing and troubleshooting. I recently went through this with the softrock-40 and suffered some because my eyes weren't as good as they used to be. If I hadn't been able to flip the board over to probe it with the poser on, I would probably still have a non operational board!
Having an extension cable available to allow the boards to be split apart for troubleshooting would be highly desirable, especially if they can't be tested separately:>:
I should have bought more than 2 softrocks, I won't make that error with the softrock ver 5. Sure sounds like lots 'o users are laying in wait to pounce when you open the flood gates for the new version of the softrock.
Regards,
Art