I realise it's probably a bit late for the OP, but I've just had my fuel pump refurbished by Lawson Diesel in Edinburgh and made use of Bonnington Mill Garage located directly next door for the removal and refit. They claimed to have knowledge of Bongos and I was very pleased with the service I ...

Yup - you want Campers Scotland - formerly of Tillicoultry but now at Grangemouth. He'll drop you off/pick you up from Falkirk train station if you need to leave the van with him.

See http://www.campers-scotland.com/

I've just done this mod - using a 100ohm 2W resistor from Maplin (part number D100R here: http://www.maplin.co.uk/metal-film-2w-resistor-5729 ) and two insulated ring crimps. I left the diode alone and had similar results to you - ie. little effect. By shorting the diode with a few (careful) twists ...

Hi Mike -

I'm after something similar - who did it for you?