Hi gords. I think the driver you have there is the same one I used here,
I had a problem with it that it dropped down in amps a fair bit after about 5 minutes in operation on high. Hows yours going? It put out something like 6 amps on high. I dont recall whether I mentioned I have a couple of these on order,
http://intl-outdoor.com/boostbuck-318v-triple-xml-circuit-board-p-542.html
I have one of these in use at the moment from another supplier and it also runs at 6 amps with a single LED. This is a waste as theres no difference in light output from medium which is still to high at 5 amps. I aim to put a copper star in this and try and make use of this current. I realise that its to big to fit in your pill but just interested in your thoughts.