I need a solution to the heater tap. In my Brumby/BRAT when i turn the heating on it works, but when i turn it off again the tap doesn't fully close. Not site if its a cable issue our the vavle itself? Is there a better tap from another brand that i can use as most of the taps I've seen are rusty all over and stiff to operate.

Check the cables and the little geared mechanism between the switch and the tap to make sure there's no slop in there.

Guys on ausubaru.com have used the VT/VX/VY heater tap - it's roughly the same shape but vacuum operated.  I don't know how they've got around this vacuum operation but it'd be doable and I'm sure you'd have it nailed

Cheers

Bennie