Thanks! Yes, I was aware of that: you have to take an equal amount of the base and the blade and re-profile the blade.
Shouldn’t be to big a job with a lathe.
Do you know if the No.1 foresight specs were identical to No.4 foresight specs, dovetail-foot wise?
In other words, will a No.1 foresight fit a No.4 foresight without the need to change anything?