I needed a gridplate that would mount in the mill vise to machine the disc brake mount and other flat pieces. Since it is also the axle bearing retainer it has a shallow relief where it retains the bearing. I made a quick pattern with the intention of using up some of my junk bifilm infused ingots since their appearance was unimportant due to them being a sacrificial surface for drilling. I rammed a couple molds with the sprue directly into the base with an 1.5" shrink bob. I added the ingots to a hot crucible and added fresh wheelium to have enough metal and poured at 1200*. I ran low on metal had to go back to the furnace to pour the second plate. After shutting down I dunked the first casting and started machining. Beautiful chips and no detectable bifilm. I set up a surfacing program in Mach 3 and then followed with a 2" dremel disc with three .001" passes. It is flat, those are just the swirl marks and no visible inclusions. I followed with a grid drill program and threaded the holes for hold downs. Here is brake bracket ready for bolt holes and circular relief. the bolt head is center drilled for 0,0 location although I used the center hole as the start point for the grid and can always pick up from there.