I may be a little picky but...............
I use velcro on my Boss typre pedals with absolutely no trouble. For my larger pedals like Route 66 and Reverende Drivetrain I remove the battery lid screw and carefully mark the spot where I want it on the board and drill a hole through the board and replace the screw with one long enough to go through the board and into the pedal. This works really well. You don't have to remove the feet or anything.
On a couple of other pedals like the Morley JD-10 I have taken the the housing apart (very simple) and actually drilled a couple of small holes in the base and screwed it to the board.
...it's not the load that breaks you down it's the way in which you carry it.