What ARMs are you using vaughan, outside of Odroid-N2s and -XU4s, and how many?
Are they all running ArchLinux|ARM?
My Odroid-M1 received its OS straight from the internet via netboot (Debian 11, kernel 5.18) to the PCIe 3.0 x2 M.2 NVMe SSD I bought for it -four times as fast as the PCIe 2.0 x1 that e.g. the Raspberry Pi CM4 can give to you.
The chief engineer remarked that in the case of a second M1 he insists on buying a 17'' laptop cooler to set them both unto, as the humungous heatsink (100 x 123 mm!) still gets hot to the touch running BOINC. In the meantime a harddisk cooler might also be useful, but there are even persistent rumours that a 80mm Odroid-N2+ cooling fan might fit...