Ok Rob, I have been waiting, trying a feed a week.... hasn't eaten for me yet. Next week I will try your method, the snake looks healthy, skin is good, wait looks good, eyes clear, no sign of mites (that I can see) very chilled out to handle. So far I have handled him/her a bit but, leave her alone for a few days before each feed attempt.
The viv is smallish and dark, but it is usually around the 70degree F, no basking spot. little climbing frame in there, small bit of plant cover (not much)
Still open to suggestions people :
It is incredible the lengths we go to!!! lol, we must be nuts