What I'd like to have on the 43S is convenient access to base 2, 8, 10 and 16 integer modes and logic operations. Switching between base 2, 8, 10 and 16 and leaving integer mode would need to be possible with two keypresses at most (whether it's shifted operations like on the 34S or soft keys) in order for the calculator be really useful to people like me.

- If no non-shifted key position is allocated for this, we'd need need four shifted key positions for base 2, 8, 10 and 16, and a fifth for leaving integer mode (it already exists as .d I think). While in integer mode, soft keys would be assigned to logic operations.
- If one non-shifted key position is allocated, it could first display the soft keys for switching between bases, but once in integer mode, the soft keys would automatically switch to logic operations. The same physical key could then be used to switch between soft keys for logic operations and bases.
- If two non-shifted key positions are allocated, one of them could display the soft keys for switching between bases and the other for logic operations.

I consider being able to view a number in a given base without switching to that mode (as on the 34S) not essential but very useful.