Ah Velcro – is there anything it can't do?
I took a similar approach, after the holder clip that goes onto the spreader tray annoyed the heck out of me. I put pieces of Velcro (the fluffy side) around all three legs just below the spreader and stuck the other side onto the hand controller (as well as onto the SkyFi). Now can I slap the controller against the nearest leg and it will stick regardless of its orientation.
I've also put a piece of Velcro onto the flat side of the HEQ5pro mount, to hold my dew controller when needed.
Cheers
Steffen.