Special case blockbandwidths for unitblocks

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 89.55%. Comparing base (95fb340) to head (f72d37f).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #207 +/- ## ========================================== + Coverage 89.53% 89.55% +0.02% ========================================== Files 11 11 Lines 1108 1111 +3 ========================================== + Hits 992 995 +3 Misses 116 116 ```

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