Start by disassembling the marker to get to the trigger.
Prep the trigger by turning the return spring tension screw out until there is about 4 threads showing.

Bend the stock return spring around the mounting pin or anything of similar diameter until it is 180 degrees or cut the end off as I did.

Next sacrifice your pen for it's ever elusive "pen spring". Cut to the approximate length, depending on how much return pressure you are looking for (may require some trial and error) and stretch the last coil on the end you cut as shown.

Place the spring with the stretched coil over the two pins in the marker body as shown.

Place your modified stock return spring in the marker with the long arm of the stock spring holding the pen spring in the body.

While holding the stock return spring down with your finger place the tension screw on your trigger in the other end of the spring and reinstall the trigger on it's pivot. Once in place it all stays in there. No worries of it all flying out at you when you assemble or disassemble.

Reinstall the selector shaft barrel and trigger guard. Reassemble marker and adjust trigger as needed, although you shouldn't have to unless you are installing a new trigger as I did.

The only down side is that you have to take the marker apart to adjust the trigger return tension and if you were to cut it too short you would have destroy another pen for it's donor spring LOL. Only cut about a half coil off at a time and you should be fine. If you are using a stock trigger your spring will be slightly shorter than mine depending on how much tension you want. I personally don't like alot of return tension as I like to walk my trigger.
Oh and It walks like no one business now!
Thanks to Dave at Flasc for another great BT upgrade!



















