I have one of these and it is OK, but I ended up making one.

I like mine because I can rotate it sideways or even upside down.

I stopped playing with the RC solutions because it is a bit short for the 9920. When securely mounted, red and black wires have to make too tight of a bend radius to be very practical.

Drilling a large hole to put the wires through might work. (Through the tray and motor mount.)

I just thought of that while I was typing. I will give it a shot when I figure out my controller issues.

There is a guy on eBay that sells them for $8.00 his ID is spotswerth. I have purchased three items from him and had great results. I see he has one up for auction right now. I did a buy it now for the 8 bucks.

Hope this helps.

Cheers