That will be interesting - but then again it will depend on how many blocks are being swapped internationally.
I have not yet decided on how many will actually be submitted by myself....just taking it one block at a time until I complete a set and I'll see from there.
Have just wasted the morning's efforts of cutting..... cut all the 3 7/8 black squares short of square. ie 3 7/8 x 3 5/8. I could kick myself.....probably wouldn't have happened if I'd done the cleaning and tidying instead!!!