Peli case.
I have a 1510 that’ll hold 2 Elektrons an OP-1 & a laptop (in the lid pocket).
The larger models will easily carry 3 units.
1510 can be taken as hand luggage on flights, larger version will need to be checked.
Peli’s ain’t cheap but they’re worth it. Beware cheap copies, they’re fine if your just chucking them in & out of your car but fly with them & it’ll end in tears 
