Each of the Boomerangs I've been in there have been a few late blocks and a couple who didn't send at all-usually a few people send 2, it makes up the diffence, sometimes. Quite often with sashing you don't necessarily need all 35-mixing with plan blocks may expand the needed blocks if you find yourself in a time crunch. I know we all try to get the blocks in on time but sometimes life gets in the way of our good intentions.