It lives!
Final finishing hook-up went well. Here's my 1st pic with the 8.1V remote PSU for the 450D.
The only issue is that it gives a "Battery Low" warning. When I took apart the battery I noticed a battery monitoring cct (middle pin). This cct monitors 1/2 the battery voltage. It draws voltage from one of the 2 internal cells.
I suspect that I could use a resistor to supply this "monitor cct"..but Meh! It works without it.
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