Summary

My handle is was too small, so I doodled one up on Tinkercad and tried it. It fits nicely and does the job. My doodling is your gain.

As always, fitment is very snug, as no movement on the shaft after installation is the goal. Original roll pins work perfectly, and the cutout allows them to fit flush.

I used PET-CF for the current one, ASA worked on the first iteration (that's what I had loaded).

Print Settings

Printer Brand:

QIDI

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p>Tech Q1 pro</p></div></p>                                                                                <p class="detail-setting rafts"><strong>Rafts: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>0.16mm</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>100 percent</p></div></p>                                                    <strong>Filament:</strong> SarayaTech Fibreheart PET-CF                Black                    <br>                        <p class="detail-setting notes"><strong>Notes: </strong>                    </p><div><p>Printing at 100% size is VERY snug. You may want to go + 1% or 2% if it seems to be too tight. </p><p>Orca Slicer with 10 walls, tops, bottoms, and 100% infill.  No supports needed if oriented with mounting hole facing up. </p></div>

CZ Bren 2MS extended charging handle