I have been using a AVL58 transmitter which has a fan and smooth sides making it ideal to mount on the bottom of the phantom using two-sided tape. My new TS-353 tranmitter has a heat sink on top and some protruding circuit board whatchamacallits on the bottom. I didn't want to use my heavy-duty 2-sided tape for either side. I googled it and see it stuck with tape and velcro on either side. Not too sure if the transmitter would get too hot with it's heat sink buried in tape or if it wold be wiser to let the tape stick all over the circuit board. How did you mount yours?