thusband The internals of the group are slightly different to a standard E61, in terms of the spring types, count and position.
- This spring is unchanged
- This spring has increased tension (around 12.5+ bar = to that of spring 3 so the preinfusion chamber won’t open during the shot
- This spring is absent as is the valve, because these functions are now performed by the disabled preinfusion chamber
This means the best position for actually screwing on the lower half will be when spring 2 is under Minimum tension. This will be either lever at 45 degrees (neutral position) or lever up as if pulling a shot.