Uwe, 
 
	Amazing and helpful video worked for me had my machine running like a top until last night, not sure what happened but something not good.  broke needle stopped machine dead, thread stuck in race etc.  Now my rear most hook position is almost a quarter of a turn too far back and the rear most movement doesn't align with my 0 degree position,  where is the adjustment for that part of the timing.  I can set the rear most position to the 1mm visible hook but it isn't in time with the correct position of needle or wheel...