Like I said - it is an inherited legacy system I'm upgrading to DF19.1/DR8.0/MS SQL (that final aspect being the most important part), so for the moment I'm changing as little as possible to ensure that the existing functionality is retained. RDS is an option I'll explore later, although it seems unlikely that, now I have it working (thanks to Vincent, Peter & Mr Mullan), it is anything I'll be in a hurry to change.