For transporting my MagMod octa-boxes I had high hopes for the MagBox Large Case which for the most part meets more than the advertised requirements. Clearly the promotional info confirms what this larger case can carry, and this is all believable. What the promo detail doesn't say is what it can really carry.
In my MagBox Large Case I easily carry my 42" octa and my 24" octa, two grids; one for each, two speedlights with MagGrip's fitted, two MagRing's two MagShoe's, two CTO gels supplied with the octa's, full set of Pro Gels (original) and two gel holders, two MagGrid's, MagSphere and MagBounce, then down the middle a full size standard light stand (with the legs retaining screw removed and stored in the lid pocket).
This would be perfect except for the crap yellow strap that runs the entire outside length of the case, which slips undone to its full length when you use it to pick up the case (whether empty or full of all my modifiers). It would seem this was an after thought to the design, which wasn't at all thought through. There are a couple of D-rings supplied to attach you own carry strap, which you will need to provide.
So don't underestimate how crap the supplied/fitted strap is, supply your own to make this case as easy to carry as the contents are to use.