What I did was got 2 of these cases. Cut down a 1/4 plywood board long and wide enough to hold both cases. with a little extra around the edges... Not to much, didn't want my foot to grab. Centered the cases onto the board and drilled some hole in them. secured them down with nuts bolts and washers. After the cases were bolted down to the board I drilled a connection hole big enough for the connector to go through in the side of the middle of the cases where they meet to allow me to thread the 6 plug wires through and Waaaaa LAAAA a 6 case Boss holder... Also with this set up to carry it somewhere all I do is unplug the middle 2 get the covers and cover them, lift up on one of the handles and I'm carring all 6 pedals at one time, WITH the board they will be on when I get to my next location... Works for ME...Later