Okay, here are a few things I have learned...
1) The heritage spec (short shaft) pots will fit at least some non-Custom Shop guitars.  
 
There is no length to spare, and I installed them without the star washers, but they can be installed. At least on my 2009 Standard.
2) The taper on those really are DIFFERENT - and indeed do add a great deal of low volume control. Which is ideal for an Express.
3) I was playing w/out my Z-Air-Break and that seems to clean things up and improve the "clean-ish" range A LOT.
This even works reasonably well with the stock control section installed in the 2009. So, I really happy with that.
That's with 5751's in V1 and V2 and a 12AT7 in the PI.
I'm still going play with a switchable split-plate-load to see if I can get a second "personality" that will work well through the air-break at/around bedroom level.
Again, many thanks to all.
-Paul