Hi jarcaranda
Had not posted any updates as i thought i would give it a week or two.
First week seems to have gone okay. Now I have the pump bow rigged to take the hose reel i find i am leaving the gear in the car more often than not. Can be up and running in a couple of minutes now rather than the playing around setting up the trolley. The voltage reulator seems to be handling fine also. I checked the specs on the regulator on the companies website. The module can handle 3-5watts. The pump is rated at 7 watts so that is the only concern.
It only cost £15 so if it dies i will not be too upset. If it does go sooner rather than later I will be sure to report back ASAP
Lee (aka solo)