Hello both
Thanks for your help and input here. I have actually solved the Airtable lag (and just posted about it here : https://community.glideapps.com/t/user-specific-columns-and-airtable-sync/56946/8
Great tips re sorting and grouping too. A little clunky but it works as you say - so thanks. Same goes for the filtering a collection option (showing a no records found message) - I have not implemented that yet, but what you say makes sense.
Thanks,
Andrew