Ok. The idea here was to make a new version of the XD100, that was capable of carrying a larger number of weapons. On the surface, this 4 slot variant fits the bill.... but have you seen how far over the cab those things hang?! Clearly I didn't take into account the dimensions of the weapons when I as designing the wider trailer - it most certainly needs to be about 6, if not 8 studs longer!!
My original plan was for something that opened up rather than flipped up, like a large box with the weapons stored in the sides (something like the original battle station trailer cab that came with G1 Optimus Prime) but as usual I was trying to keep the design small as to not make the joints and hinges too complex (I'm not that comfortable yet building using technic parts).
I'll give it a couple of days to see what feedback this gets before attempting version 3. However I think this probably will go in the "prototype" column and not the "field ready" column.