No undermining detected Nick..
I recognise the finite supply of original Bosch lamps and respect efforts to preserve them, whilst being able to supply a means to an alternative via adapter rings.
Your kit will be in the post in the morning Frankendesmo, you have the last but one Black one. I do still have a good supply of Gold ones and a stock of bare ones that I am tempted to spray black, as they seem the more popular.