Now have em wired up, working and yes the hands are nice & warm;)
Left it running on the low setting for a solid 5 mins before the left grip heated enough to notice with bare hands (would have been good to insulate the bar first , as a lot of the heat is transferred into the bars first:huh: ) The throttle tube, being plastic, is almost instantaneous warmth:)

I have temporarily wired the power lead straight from the battery at present, till I am 100 % happy with the test ride on Monday,,,, I also need to get to work to use the heat gun to shrink all the heatshrink on the cable connections etc;)
One point to note is , the positioning on the WHITE RESISTOR, as it gets F@%#&*@G HOT:blink: So be careful to keep it away from other importatnt cables & plastic parts!!!
Mine is cable tied to a small steel bar on the bottom of the headlight assembly, where it will also get tonnes of fresh cool air whilst on the move 
So FAR, Very Happy indeed:woohoo:
Good Luck All