Completed some minor cosmetic adjustments in preparation for returning this to its owner

POWER SUPPLY DOOR WASN'T LATCHING

The IBM 1130 has a footwell underneath the keyboard portion of the tabletop and the right side of that well is a door that covers the main voltage rail regulators (+3, +6 and -3). It should stay latched closed and require a small screwdriver or other straight object to release it by pressing through a hole on the back panel of the footwell recess. 

It was not doing so, because it was misaligned. I had to adjust the hinges for that access door but also the back panel in the footwell needed to be braced outward an appropriate amount so the latch would catch. I crawled inside and then under the footwell, making this work as it should. 

REAR COVER BEHIND DISK DRIVE WAS SLIGHTLY ASKEW

When you face the rear of the IBM 1130, there are two doors that are hinged at the left and right edge of the machine. The right door is long, because the long logic gates are inside and swing out for service. It closes with a spherical head that snaps into a latch on the frame. The left door should swing in and close with only a small gap between the two doors. The latch which I had to build is on the left door - a handle that you lift to release or to lock the left door in its closed position. 

Both doors were sagging at their far ends and thus the top corners of the two doors interfered, having a negative gap when you attempted to close them. The solution was to fix both so they hung with their top edge parallel to the floor, without sagging at the ends. 

After I moved the hinges around and tweaked some things, the doors fit perfectly and look much better as well.