For mounting, there are four slotted screw holes in the bottom of each controller, So I mounted 1- 10" x 10" x 5/8" plywood 'mounting plate' on each arm of my chair.
then added 4 pan head screws to each one [to match layout on the controller base], and left about 3/16" sticking up so they'd fit into the slots. Works like a champ, and at just the right height too!
If you choose to go the velcro route, That works also, But don't scrimp on the stuff, or you'll pull yer stick off in heavy combat

If you're worried about using velcro etc. "on such a nice stick", No prob. You can get the self adhesive kind from office max, and when you're done, it comes off fairly easy w/no marring.
And the optional suction cups.... Don't .
S!