The philosophy for the PSL is to have all the systems the same as possible. With the help of folk from LHO I've attempted to summarize the differences in the site PSL's as they currently stand. This will hopefully help track all the differences so we can converge again at some stage and also help with noise hunting and why might see something at one site and not another.

See T1600592. I'm hoping for this to be a living document and as new changes are made, or old changes reverted, that this is tracked here