Revert "change the default value of turn length"

This reverts commit e08b9da3dc747d56fe928180cc54033056de3c1e.
Revert "account for header that's bigger than one cycle"

This reverts commit 10b90036cb3997f7e58028a9e2b2f911bc52cc49.
Revert "add addtional header for data spanning several turns"

This reverts commit 5ee636dddee9b40bd57694bfaa3928e92e4c38ac.