Technical tests
- PE decomposition, e.g. does 24*12 match 9*15?
- LRUN vs NRUN+NRUN, e.g. does two day run match two one day runs?
- Does NRUN+CRUN match NRUN+NRUN?
What are bugs likely to change?
- Bulk measurements - likely to be very small (big stuff should have
been picked up by now)
- Conservations - I think is more likely to be a problem
