Thanks for the help guys, this is very helpful.
I tried to obtain some schottkys and caps today but only managed a handful of caps. The diodes seem to be very difficult to get hold of in Derby. I tried a few places here including Maplin's (UK equivalent of Radioshack) and they only had 3 Amp ones.
Curses!
My instructions for the ESC seem quite adamant that the schottky should be there. It gives no mention of the 3rd cap (but I'll put one in anyway).
Does anyone know a mail-order place in the UK that supplies a GOOD range of electronic components? Maplin's blow.