Hi! You already have the new module with the switch to choose between the old and new BD behavior. Just unscrew the 8 screws on the back of your Pulsar, lift up the back plate and you will find the switch in the corner of the BD module.
The BD oscillator restart switch is in the left bottom corner.
In the up position, marked as STAB, the BD oscillator will restart on each BD trigger.
In the down position, the BD works in the original Pulsar mode.
To make the restart function work stable, ATT knob must be in the minimum or very close to it.
REL must be short enough to decay before the next triggering.
Triggering velocity must be close to the maximum.
In some settings stability may also depends on TUNE knob position.