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The data on the individual block pieces can be viewed in Rx-Universe, using the "Re-use blocks" option on the "Device" menu.
Blocks can be looked up using either the BlockPiece ID, or by JOB ID. For each blockpiece, the following information is available to be viewed:
The BLKDM1 and BLKDM2 fields are the diameter of the block, after cribbing, as reported by the generator. If the two values are different, the block is elliptically-shaped, and the "Elliptical axis" field would indicate the axis of the ellipse.
The only fields that can be changed are the BIN, the BLKSH, and the number of times the block has been used.