Many thanks Alex!
I'll shoe horn the caps in. They'll be a tight fit. I'm kinda of a belt and braces guy and like to over-engineer the stuff I build. It's always preferable to try and nip the interference at it's source, rather than to try and filter it out further down the line. Voltage spikes propogating back and frying the VTX case in point -)
As an aside, I'm not entirely certain that an electrolytic cap (by itself) may entirely absorb all the HF rubbish generated. But it'd go some way to taming it.. wonder why they don't put them in? Perhaps it's a cost thing..
Re: phone support. Ok - I didn't realise there was just two of you. In which case, I completely understand! I hope unmannedtech grows big!
All the very best, Chris.