I have a fairly big tree on Ancestry with lots of Ancestry sources and a fair number of sources added from elsewhere on the internet.
I recently also got a subscription to FindmyPast. Ancestry still has many more sources than it does, but there are places - the 1939 Register, Westminster City records, records from British India and now Irish Quaker records - where FindmyPast has lots that Ancestry doesn't.
Adding to and correcting my Ancestry tree using searches on FindmyPast is OK, but maintaining the source data so that it will for example pass to Wikitree is far too much work to be practical.
Does anyone know how to manage this? For example, is there any 3rd party software that can maintain trees, search on Ancestry and FindmyPast, add sources from both and upload results back to Ancestry?
All ideas welcome.