There are many ways to activate the reed switch. I chose to move the magnet at 90 degrees to the switch. This minimises the possibility of cross-talk between adjacent magnets and switches.
I decided to replace the supplied magnets with magnets mounted in a plastic casing. These were attached to the lower face of the pedal with some 10mm x 10mm aluminium angle.
In order to mount the switches, I cut some 20mm x 10mm hardwood strip into 25mm lengths. 2 holes were drilled, one into which the reed switch is inserted, and the other to attach the mount to the pedalboard.
Once I have the reed switch in a suitable position, I'll secure it in the block using silicon. Any future adjustment will be made by slotting the mounting hole.
Picture above shows the magnet in the off position.
As above but in the on position.
The magnet lines up with the switch.
30 reed switch mounts.
One down, 29 to do!