NCBOX Linuxcnc 2.6 Spindle Orientation Question

Hi,
i spent now several Days to get Spindle Orientation running on an NCBox with Andys image (linuxcnc 8.04)
i compiled an 2.6pre and everything is normal but N19 doesn't work.
So i read all the stuff i could find and the configs simply did not start the motor
Question 1 ) is it the case that i need an Encoder on the spindle with A,B and Index ???
I only (see picture ) have one Hall sensor which works.
So i then found mr haberler style and used his ngc files as starting point.

Then i tried to REMAP M19 so it gave me an unknown m code ,..
i moved then to M419 and it used the file ,..
And i finally got an Version working using Remap on an NGC file and use of several M66 E xx functions Video is like
So i could be happy and proceed with Toolchanger on the carousel but my question
How to do it right ? Are there several Paths to it ?
like orient module
motion pins and the ngc style ?
So if anyone has an hint please
i also ad the fotos to see my test situation
enjoy
thomas

There you see my test environment with
NCBOX Triple Beast my enclosure the cabling the PCB i build driving the NPN Switch



This is the inside of the head where you can see the Metal part for index and the switch (which is from an Bridgeport 412 -

Thank you for the fast answer that is so cool
i can develop but i have never used mux2 and and2 i ´ll read that up and give it a try
if it works i am happy to write down an how to
Do you have in your files some example i can use as an start
(i thought the reason of my M error is because M19 is already known - )
I used an S100 M3 to rotate that worked verry accurate (because of the heavy spindle)
and the bridgeport 412 has a brake as well so
thx
thomas