Looking for two DEC H445 power bricks for PDP 11/40 project

[P Gebhardt]

>    > From: Henk Gooijen
>
>   > As far as I know, the 11/40 uses only one H745.
>
>Depends on what kind of memory it has. If MF11-L, it has two H745's; if
>MM11-U, it has an H745 and an H754.
>
>(The harness has two different connectors for the 5th 'brick', so it can
>handle either kind. At least, that's the situation on the later machines
>[serial numbers above 6000]; early production /40's only support the MF11-L,
>and you have to use special add-on harnesses to support an MF11-U in them;
>see DEC-11-H40SA-B-D, Chapter 6 for the details.)

As I don't have core memory modules available, I thought of using MS11 memory, 
which, according to my research, seems to be an option for 11/40 systems. 
The system manual states on page 6-7 that the base power configuration consists
of two H745 regulators and that one may be swapped with a H754 in case MF11-U 
memory is used. 
Does that mean that a single H745 regulator might be sufficient for my needs?

All the best,
Pierre