Palette Joiner Plates

I really like the idea of joiner plates . In my case , it’d be with the newer model palette cases . The ability to stack multiple 4u 62HP and possibly 104HP palettes would open up many possibilities while still offering its current portability . Though I’ve contemplated upgrading to a 7u , being able to throw my palette in my book bag is everything . Is there any luck for us wanting to do so ?