I have decided to use a different switch, due to the low mode. It will probably be around a two week wait for the switches to turn up.
I don not know if this mod will work on the HID0109, I would guess the high would, not sure about the low.
The low mode I have added run's VERY close to the ballast cut out when the battery is hot of the charger, that is for me 23 watts into the ballast, on a fresh charge I get within 1W of this, if anyone was to have a problem with the low mode (when the battery is fully charged) I would expect that a few minutes running normally would fix it. My battery gave 45 minutes of run time using the low mode.
When the torch cuts on low voltage power consumption it around 28W.
The high mode will give you 65W at the ballast (up from 40) for at least 4 minutes, my sad battery gave 5 minutes at 65W, to 60 watts took 8 minutes, then a dive to 50W in 3 minutes and cut out, in total my battery gave 16 minutes of continuous high operation.
The high mode will work when using the 12v car input, though with up to 90W consumed by the ballast I could not recommend continuous operation in High, low will most likely not work.