Thanks for this, works like a charm and exactly what I needed. Especially nice that it does a delta and not simply overwrites the target profile (as I already had some new communities I was following in the target account).
Only thing I missed was a swap or reverse for Download and Upload, as I wanted to sync both accounts. Just meant I had to fill in both forms again, no biggie.
Thanks again!
Another good resource which has helped me during the transition from Reddit: sub.rehab.
Thank you, your hard work is very much appreciated!