Hey folks, So I'm a Pinewood Derby enthusiast. One of the things I'd like to contribute to the hobby would be an inexpensive device to easily improve the radial runout of the stock wheels sold by the BSA. Currently, you need an actual lathe to accurately turn wheels with any reasonable degree of success. There's a hand tool available, but it's quite difficult to use with any degree of success...definitely not something a kid can do! So the world of slot cars has inspired me a bit, and I see that there exist several wheel lathes for these cars...some professional, some homebuilt. For example: The typical way of working a Pinewood Derby wheel is to mount the bore on a pin with a push (interference) fit, which is then turned in a lathe. I imagine for this project I would either employ a machine turned shaft with the end turned down to the appropriate pin size (maybe .098" or .097"), or a shaft with an ER11 collet chuck on the end, holding a pin gage of the appropriate thickness. My immediate problem that I'm trying to solve is: What can I use to hold the shaft that will let it turn with very little radial runout (I'd like the finished wheel to be under .002" of runout), and will resist deflection when pressure is put on the wheel from the cutting or sanding tool employed to turn down the radius? I have tried a pillow block bearing, but it had a lot of "play" in it, and didn't hold up to even the smallest amount of deflection. Can somebody suggest a better mounting solution? If I can give any more details of what I'm trying to do, please let me know!