May I make a suggestion? Maybe change the amount of participants?
50 blocks will basically only give you one layout choice for most members... 5 X 10
If you make it one of these amounts, there won't be any left over blocks :wink:
6 X 7 = 42
7 X 7 = 49
7 X 8 = 56
in your description of the block, isn't it a 3 rail, not 4 :wink: