@engikeneer - thank you that's very helpful. I did read the manual about taper - but didn't quite get it - but do now thanks!
Yes - I'd prefer to only have the bed compensation applied on the first few layers and then let whatever slop is left get melted into subsequent layers. I'm certainly not printing anything for aerospace - so aside from being dimensionally in the ballpark and staying stuck down - I'm not worried.
@Phaedrux - thanks - I read it but didn't understand the parts I mentioned in my first post.
I'm going to go back and re-read now...