Bumot Topcase secure locking down

Just a small issue that might seem nothing to others, but saves scratching the head, I got my new panniers and topcase, up to now all perfect, then when I put the topcase on the standard oem BMW GSA rack, and secured the topcase by turning as hard as I could on the big wheel style nuts inside and thinking perfect, then when I pulled a little on the topcase, it would slide a little bit around, so I looked under the topcase and realised the 3 nuts underneath that slot into the rail, are left slightly loose, this is for quick taking off off the topcase, so I tightened up the 3 nuts and and with a 5mm allen key for inside, this made the topcase solid and no more sliding around, obviously this is fine for me as topcase stays on the bike, I also found that the nut on the bracket on the left hand side, touches slightly the Touratech toolbox on the bottom, so you have to put the toolbox, as high as possible, on BMW oem racks, and last but not least I got 2 keys for Topcase, and 4 keys for the panniers, and pannier keys fit Topcase also, hope these keys are only fitted for my panniers and topcase, otherwise, quality kit at a decent price, very happy indeed, but get yourself some BMW or other handles, as you could drop the pannier taking it off.