Vibroplex Lightning bug replacement paddles

I designed replacement paddles for my 1928 Vibroplex Lightning bug. I wasn't too crazy about the knob and single paddle design, so I opted with a dual paddle design which I find pretty comfortable. The paddle itself is also a tad bit longer than the stock Vibroplex paddle. To replace the screw on the knob, I went to my local ace hardware and found a replacement button head screw. I can't recall the thread pitch off memory, but I believe it is a 6/32 pitch by 1/4 inch long. I suggest removing the knob and taking it with you to the hardware store to compare.