Looks like you are going with the second design. In your first design, the choke would have been backwards and you would have had the male thread from the choke and the male thread from the blade holder on top of each other. The reason the choke has the longer section of solid on one end is because it is female threaded on that end. But looks like you are fine now with the second version. You may want to re-evaluate the blade screw. It looks like where you have it now on the first drawing will be beneath the blade stop and into the LED/optic section of the holder. In any case, you will want to move it higher up so you are not at the very bottom edge of the blade.