I finished my mystery project last night so I can finally reveal what all those diamonds were for ... an argyle cushion:
It's made from two brown wool sweaters (recycled into felt), so it's lovely and soft. It'll be making its home on our sofa...
... I'm really pleased with how it turned out, and the boyfriend even approves (it's probably all that brown, boys like brown, don't they?).
I've written up some instructions for anyone who fancies making their own bit of argyle goodness. Check back tomorrow for the tutorial!