I know. I'd eventually like to build a DIY driver too. To get Meanwells with the full XM-L drive current capability, they trade off the total voltage to supply more drive current and not exceed the same unit wattage limitations. Just wishing for a way to fully push the XM-Ls without having to buy 4 Meanwell drivers.
I look forward to seeing how you've designed your controller PCB and the parts layout.