I found some heavy browning bearings (4 bolt flange) at a bearing shop and I've talked to a machine shop that will mill my spindle, but I don't know much about spindles and bearings. Will it be safe to use a straight shaft with set screw bearings. Do they hold well, it seems without milling the ends of the shaft down, if the set screws come loose the spindle could wiggle out. I can get thicker stock and have them machine it down, but at $40 or $50 an hour for the machining, if they only need to put threads on a straight shaft it would be much cheaper. (Eccentric bearings sound safer, but it sounds like they can only spin in one direction, limiting the use of the spindle). Input from someone with more experience with bearings would be great. Thanks