Like several others I took my GB pistol apart without knowing just how tricky it would be to get the hammer and sear spring back in correctly. There's a pretty creative solution already posted here using copper wire, but I figured I could make something simpler. I designed a 3D-printed tool that makes reinstallation of the sear very quick and easy. I uploaded the files to GrabCAD here. My samples were made on an SLA printer. If you have an FDM or SLS printer it should work too, but I haven't tried those personally. If you don't have access to a 3D printer, there are a number of companies that offer 3D printing services. My personal recommendation would be a company called Xometry. At the time of posting their quote tool gave me a price of about $10 for an SLS part (plus shipping). Anyways, here's how it works. The starting point for these instructions assumes you have assembled all the parts except for the sear and sear pin. Ideally the grip panels have not yet been installed. I have the gun in a vise so I can take pictures, but it isn't necessary. Pull the trigger and press down on the trigger bar. This will disconnect the hammer from the trigger bar and allow you to flip it forward into the magwell. With the hammer pointing down the magwell, make sure the rounded spring legs of the torsion springs are pointing up. The right spring leg can sometimes get caught on the frame, so this is why you want the grip panels removed. Insert the spring tool into the frame. The forked ends should hold the spring legs, and the step in the tool will hook into the rear ledge of the frame. Make sure the spring legs are centered in the grooves of the forked ends. Pull the hammer up out of the magwell and rotate it back until it reengages with the trigger bar. The tool will hold the spring legs in place and tension the springs. Reinstall the sear and sear pin. You'll have to use the sear to push the hammer back slightly until the holes for the pin line up. Careful not to bump the tool out of place. Remove the tool from the frame. Pushing forward before you lift it out will save wear and tear on the step that hooks it into the frame. Your hammer and sear should now have the correct spring pressure. Let me know if you have any questions or feedback.