Milling aluminum housing

Today I found the first good use for the milling machine. I had this cast aluminum housing for an electronics project, with ridges on the inside. I made a hole for a connector in it, but I never got the nut on the inside flat to the surface because of the ridges on the inside of the housing. I decided to use the mill to flatten the surface on the inside of the housing. The housing did not fit in the clamp, so I had to find a way to get it attached to the bed of the mill in a different way. I took a piece of wood, drilled two holes in it and bolted that to the bed of the mill. Then, I used long plywood screws and another piece of wood to hold the housing. In the picture on the right you can see this construction. I used a test indicator to align the house to the X-axis of the bed.

Since I only needed a plane large enough to place a ring and nut on, I roughly adjusted the 6mm mill to just not touch the bottom of the housing. I milled down to the point where the ridges were not visible. The image on the left is the result of the work. The mill is a very nice tool to adjust ready-made electronics housing to your likings.