Help Controller for a Lathe ?

Hello, I have a—Belgian?—Gallic 16 NC lathe. When I acquired it, I removed the control system but left the spindle power unit in place. For the control system, I use Mach3 via two parallel ports, UHU drives, and DC servos. I can also turn in a quasi-conventional manner using two electronic handwheels. The whole setup worked well for years, but it is admittedly outdated. Now I have a fault in the original main power circuit. Although I have an old wiring diagram, the actual wiring is a chaotic mess. I am now considering overhauling the main power circuit to make it organized and installing a more modern control system. However, I need to be able to use the two electronic handwheels, as there are no mechanical ones. Does anyone have experience with a control system that is affordable (the machine is 35 years old and could fail completely at any time), supports two electronic handwheels, and doesn't come with a 1,000-page manual?
In my stock is a Mesa 7I96 Eth, can I use it?
Many thanks for any replies,
Hans