When I did our first exclusive Diablo Blue run I ordered 26 pieces, essentially all the same color. I chose the JP15, JP6, L3 HH, Axis SuperSport Semi-Hollow Trem, StingRay Special basses, and the Armada. With the exception of the Armada the quantity was 5 pieces on each model. I ordered the L3 in the HH configuration because in my store those have sold better than the HSS configuration.
The piece count ordered for any exclusive run has to make sense to both the factory and to the dealer <<<--- this is the most important thing to remember.
I know that some dealers chose for their exclusive run different colors on each of several models that they ordered, while some focused on only a few models but ordered a larger quantity of them in the same color - this is evident on their websites.
While I was at the factory designing the run in early March 2019 with Brian, Scott, and the rest of the crew, the instruments weren't actually built until late Q4 2019. After the run was submitted and entered into the build system (which took some time for the new codes to be worked out) I would not have been able to add on orders for the HSS. With only X number of production slots available on a given day, adding an extra single piece (or even 5-6) after the run is completed would be a big disruption, especially in alternate configurations. The factory has to source more paint & materials specific to the package, clean the paint guns at least 2 extra times for the color change, load different build & buffing programs, etc.
With all that being said, I look forward to doing another exclusive run in the near future and adding a few new models along with some tweaks to make it a little different from the first Diablo Blue run. So as to not entirely hijack this thread, my email is below for those who may have any questions directly pertaining to that topic.