Sometimes I do some of my best thinking in the shower in the morning...
I did some playing around with the curves, please let me know your thoughts on these. I haven't put them in the box yet.
First, my engine likes 7* at idle and 32* total. Actually I think it would like 6* and 33* better, more on that in a minute.
Here is my current Run Retard curve
I don't think I want to add any vacuum advance in at idle, I think I want it to kick in just off idle...so here is my idea for a Boost Retard Curve...
It currently idles at 850 RPM and around 7 PSI
Now...and this is where my brain starts kicking in...

Can I use the Boost Retard Curve to pull even more timing out at idle, say instead of the curve being at 14.0 from 6 PSI to 8 PSI, can I put that at 16.0 to pull another 2* of timing out at idle?
This would let me bump my full advance up to 33* and still let it idle at say 6*...