@Alan Walsh When I spoke to EM Tuning I thought that they were going to make up a harness to overcome this issue if using the H7 units rather than the H4, have you spoken to them?
I guess it's to do with a dual bulb (H7) set-up rather than a dual filament bulb (H4), ie the power is cut to the low beam when high beam is engaged in the H4 but the H7 would need both the low and high beam to be live, ie a revised harness would somehow allow for the high beam feed to be split to power both H7 bulbs? (of course I may be completely wrong!)
PS, Do you have any pictures of the light output in the dark?...