I finally got rid of the hot start problem due to the failed check valve in the new DMCH fuel pump combo. I installed the S.U.R. and R. check valve.
It took about thirty minutes and after 3 days of running it I've not had a single hot start issue. Hopefully this is now a non-issue; my thought is an external check-valve will be an included item in the revised DMCH fuel pump combo.
A few shots of the installation...fairly straight forward.