AxMan will calculate a 32-bit CRC checksum (same used for the ethernet) for each split piece and include the checksum with each piece (assuming "Split to non-axman format" is not selected). This is a great addition to AxMan and there is really no reason not to include the checksum We are quite confident that you wont notice a performance difference, and it only takes up 4 bytes, but, as with most everything in AxMan, its up to you!