Show Cue System

If I have two cues, Q3 and Q4, and I insert a new cue between them, its number is the next above the highest cue in the stack. say Q78, so I then have to re-number it. I'd like it to automatically insert Q3.x, where the increment, x, is a configurable option in production properties, (default value 2). So if I insert 1 cue between Q3 and Q4 it should be Q3.2; if I then insert another between Q3.2 and Q4 it would be Q3.4 etc. I realise you can't cover all possibilities - at some point you may have to renumber to make room - OTOH, some LX consoles allow: Q3 Q3.4 Q3.42 Q3.44 Q4 etc, which means you can pretty much cover all likely requirements without running out of number space.

Thanks.