I guess this goes here. I want to have my head and board in one unit to move, but I want to be able to pull my board out and put it on the floor in front of me. Are there any shelves that come out easily, as in without a screw driver? Also my head is a Fender Rumble 350 that is of an odd size so I'm going to screw it to a shelf to mount. Any ideas on how many spaces those two combined will take? I'm thinking 4, maybe 6.