I've no problem with soldering. I was looking at Maplin LEDs either "8mm 12v panel mount leds with plastic bezel (NO3BB)" or "5mm Recessed Panel Indicator LEDs and Bezels (N91AX)" so no other holder needed. Presumably "1KΩ to 3KΩ Metal Film 0.6W Resistors (M1K8)" would suit. Thanks for the advice, Pete