I have acquired one of these sets and candidly am finding it complex to fathom out. There are 8 channels and joy sticks and pots and switches for 14 items! I'm gradually getting there but for the life of me cannot see how to get any of the pots to work a servo or any life out of channels 7 and 8 on the receiver. I'm pretty sure I have to "assign" the pots in some way or other but have no idea how to do this. I have downloaded the instruction manual but am none the wiser. Can anyone give me a simple explanation how to do this please? Thanks Geoff