Primary Trigger Problem
The problems I am having with the primary trigger is twofold. On one side, the VR sensor in the factory setup reacts to a tooth that's only 0.3mm lower than the other teeth. VEMS has very good noise suppression, it neglects noise that can be up to 50% of the signal amplitude (never happens with a proper wheel). VEMS HW noise suppression can be made poorer with higher R181, replace R181=150k with R181=270k or so.
On top of that, it turns out that the wheel has 145 teeth, not the previously supposed 72. Simplest to install 3 bolts and a HALL sensor (4-1 setup).