ColonelFazackerley I would categorise this as extreme. @andy may have hit a low block count solution quickly, but I found it difficult. Also it is unusual for @Tom to need that many blocks. It is a nice level, with diverse solutions.
andy I love your solution @ColonelFazackerley . I think the fact that there are 3 different solutions and at least one is quite simple supports my view that this is hard, not extreme. My mental model for extreme is basically "no-one could reasonably be expected to solve this"