Hello.
I think that it shows the right position for the pressure regulator.

Regulator.JPG (41.7 KiB) Viewed 177 times
Then there are the mixers,now I think that there are all parts for a minimal conversion system.
There are some sorts of mixers.

Mixer for carburator-1.JPG (39.06 KiB) Viewed 177 times

Mixer for carburator-2.JPG (40.49 KiB) Viewed 177 times

Mixer for carburator-3.JPG (20.54 KiB) Viewed 177 times
I don't know if the following mixers are suitable both for carburators and injections.

Mixers-1.JPG (42.02 KiB) Viewed 177 times
Of course, there are mixers like the third used on carburators.
Then there are mixers for injections.

Mixers-2.JPG (31.52 KiB) Viewed 177 times
The same sorts of mixers. The holes of the mixers at the third place are different. That should be the difference between a mixer for LPG and one for CNG. Now I don't think so owing the plastic mixers for Lada I saw.
I found an installation manual for a CNG system. The regulator looks like the OMVL R89/E.
There are are all electric parts for closed loop.
The starnge thing in this case is the use of a TPS or a MAP sensor for the stepper motor control unit.
I don't know if they are mappable,if there is a calibrating option for sensors,how the right position of the stepper is calculated...
I think to have found an example of a closed loop system on a car with a carburator.

Peugeot 505.jpg (21.2 KiB) Viewed 177 times
Unfortunately you can't see any evidence of it by the picture.
I think to have found a sort of mechanical closed loop device, something working like the stepper motor.

Ecomax.jpg (39.36 KiB) Viewed 177 times

Ecomax installation.jpg (810.62 KiB) Viewed 177 times
Have you ever seen it or heard of it?
The package doesn't look new, is it still in production?
Bye.