Finally solved this one too. Previously got it down to 2off. Today's first attempt 4off, then I solved it, but to me it seems like I just repeated the same moves, bizarre. I think the crucial element is placing the middle section.
No laughing here. I'm finding these levels tricky. 2off so far here.
Edit: one month later. At last I've got it. I just kept on pushing trying to find different paths to pursue. Great first level.
Tried this after Alazeh's choice, initially 10off using the route I didn't think would work, then got it using the route I thought would work. I'd probably be 10 off for months if it wasn't for the other level.