I found the foam inserts to not hold well at all; the velcro keeps coming off of the foam inserts. However, working in a sign shop, I came up with a great solution that works really well. It should be easy enough for you to go to a place and have this done if you're so inclined.
I took some scrap 3mil (equates to 1/8" thick) sintra and cut a 1" wide strip. One one side, I used a 1" thick strip of double-sided banner tape (hi-tack) and on the other side a 1" strip of velcro. I then cut this strip to length (sintra is easy to cut with a knife) and mounted two pieces on the pedal.
The thickness of the sintra is enough to put the velcro at the right spot so you can stick it to any pedal board. I've also used this on some of my older Rocktron pedals that are in the classic, larger casing with the exposed 9v battery compartment door.