I think I'll tend to some other things that need sorting before I invest in a new seat
The info. on BSA moving the tabs on later bikes is great to know.
I noticed in the pics of some new seats is that they have four holes to match either of the tab locations.
I will move on to replacing the handle bars and acquiring a grab rail.
The tank has three dents I could due without, but good luck to me!
Thanx again for the seat info