There are several problems in obs_cfht/config/colorterms.py:

1. the naming convention for Megacam --> SDSS colorterms is inadequate as it is called "e2v". It should be renamed "sdss" as in obs_subaru/hsc
2. there are missing color terms for SDSS corresponding to Megacam filters: u2, g2, r2, i2, z2 and i3.
3. the current color terms for panstarrs are identical to the sdss ones
4. there is a color term for u band in panstarrs while this filter doesn't exist