Hiya,
Thanks for that,
At first you mention Surface fillets, then at the end it says to do a "freeform fillet" - I am wondering now what the differences are.?
[Maybe not easy to explain?]

I Tried to do what you said about the base but got rather confused in the process. (Pic enclosed)
I am a slow learner it seems, (Can't teach an old dogg new tricks?) but I will go onto the Alias site and look up all the fillets and especially "Duplicate surface Curve" on 3D-101 ....
- I will have a mess around with it - then if I still cannot get the "hang" of it - I will come and Bug y'all again

Regards Scraggy