Thanks Danny, I have a couple of those, however they are 3 field plugs. I'll use the center one for signal, the second for neg and make the 3rd redundant. My new second hand radio will be here by tuesday I hope (JR quatro, ebay special). Apperantly it doesn't have digi trims but this should'nt be a prob. I'll be trying everything on the ground before flying. Although it's not stated by JR's manual, It's good advice to remove the crystal from the buddy box and I will but it's not a prob cause it's only myself and my dad that fly at the field. Anyhow thanks for all the input fellas. I'll let you know how it all goes. Kind regarrds, John.