Using an “enhanced” DAB solution, I can use this primary at 1/2K and higher, rather than the 1/1K that  I use for my std stABC-PX-DAB.

One may use micropolymer kits but, in my limited experience, it is the ” enhanced” DAB in these kits that gives the enhanced sensitivity. Using a micropolymer secondary merely saves time…but, not necessarily costs 😉