I read your post on resurrecting your TNT. (And about your most interesting motor control approach too!)
I use such a valve, but it needs an "overhead" of pressure you don’t have with 2.7 psi. I used to "stack" two original Takatuki pumps, this is possible because their housing is airtight. Means hot glueing a short piece of silicone tube onto the input of the second pump. (Connecting the other end to the output of the first pump)
With two pumps you get about 0.4 Bar which is good enough in the sense of achieving quite an improvement over your present pressure.
There are two diameters of the high pressure manifold, one for the original bearing tube diameter, one for the considerable thicker bearing tube which is the modification to the ET 2.5.
Depending on your cartridge, the ET 2.5 may a bit on the heavy side (there are posts on the experiences with both).
I think the Genesis 1000 is among the MCs with a softer suspension. So staying with the original diameter - but changing to the high pressure bearing would be optimal, because:
The high pressure version is manufactured to an - even! - closer tolerance and therefore bleeds off less air. (We talk about +/- 5um... and less for the high pressure manifold !).
So the high pressure manifold improves sound by itself and also increases the pressure you get with an existing pump. I think Bruce used to optimize the air film thickness for certain pressures for his high pressure manifolds.