Thank you very much for all the helpful replies. I have summarised the discussion here:
https://justpaste.it/9cfl9 Best wishes, Jon Cooper. jon.b.coo...@protonmail.com Sent with [Proton Mail](https://proton.me/) secure email. ######################################################################## To unsubscribe from the CCP4BB list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/WA-JISC.exe?SUBED1=CCP4BB&A=1 This message was issued to members of www.jiscmail.ac.uk/CCP4BB, a mailing list hosted by www.jiscmail.ac.uk, terms & conditions are available at https://www.jiscmail.ac.uk/policyandsecurity/
