I brought the accessory kit (the one with the famous angle unit that no-one can use), it comes with a couple of clamps and just enough room in the systainer for additional clamps and the parts from the MFT (except the the rear rail support which I leave attached to the rail).
If you do buy the accessory kit, remember to disassemble the angle unit and apply extra washers, sandpaper, glue and a fat screw to lock the unit up totally so you can use it for 90 degree cuts (instead of the obvious choice of using the rail on it's standard hinged mounting points) - if you're new to this: ignore this last advice, it's here for the entertainment of experienced foggers.....