Question Upgrades for Optiplex XE SFF

Optiplex XE is a very interesting system. There's one with anQ9650 running here so I say go for it.
https://www.userbenchmark.com/System/Dell-Precision-Tower-5810/7717
Those were designed to run in extreme environments like bill boards and airport signage. They have a much more robust 4 phase VRM than any other Opti. Very few people have attempted to mod that model. QX9650, or X 5470 Xeon swapping are unknown so far. But the hardware can handle it easily.
0W5791 is a heavy duty heatpipe cooler for Dell SFF cmoputers. It will probably fit that.
https://www.ebay.com/p/0W5971-Dell-...CPU-Heatsink-Some-Copper-Heat-Sink/1523022889
I started to build an XE DT model. I even got a GTX1060 3Gb to fit inside. But I started playing with E bikes and never finished it.