So, basically you want to keep out all Northerners from the podcast and have a 'neutral' language idiom throughout?
Neutral's another word for bland. You need character.
No, it's 'carsel'. And 'cassel' irritates my oh-so-pert tits right off into the gutter.
But then the chances are I won't be listening, so do carry on with your proposal to further bastardise the English language! :{)
so where is the 'r' in 'castle' then? ohh, hang on, do you mean more of a caaastle?