Summary This is a shift knob I designed for my Mustang. I free handed the shape while looking at a picture of an actual Hurst Shifter and I think I got it relatively close. It's made to accept a M12-1.25, which I believe is a pretty common thread for shift levers. You would need two of them for a complete install. When holding it loose, I don't like how the post forces your middle and ring finger apart so I'm going to try to make another where its a thing piece coming down to a base that the nut goes into, more similar to a real Hurst Shifter. Please print and tell me about changes you think should be made! Instructions I have yet to install mine, I just printed it today but I'll make a video of the process. Insert one M12-1.25 nut into the space at the bottom of the knob, screw the second one onto the lever as far as it'll go, then screw the nut and knob to the height and facing the proper direction then bring the second free nut up to it and tighten it. I'll post picture when I actually install mine. To print, I had the bottom of the post on the build plate, need a large amount of support material, on my next iteration I'm going to make the post and knob two separate parts, to be attached afterwards.