In actuality you guys should of picked a different laptop. The Razor Blade Stealth is only a 2 PCIe lane thunderbolt 3 output device. So the Blade Stealth is actually only outputting 16Gbps not the 40GGbps you think. So instead of the ~25% performance loss on 40Gbps, you're getting ~35% drop. So I would use a Razor blade, lennovo yoga, or even a macbook pro 13in (only the 2 TB3 ports on the right side of the 13in touch bar has 4 PCIe lanes, and the Non touch bar only has 2 TB3 2PCIe lane thunderbolt 3 ports), and the 15In has 4line PCIe thunderbolt 3 on all 4 ports. While its not big deal really, but i would want to get out all of the power out of the GPU if it was my setup.
So other than that love what yall did. Practically my setup but I use a Macbook, and I only have a TB3 dock by cable matters. I am looking to get a EGPU at some time. But TB3 EGPU's are expense.
Just another confusing and usb c/ thunderbolt 3. But still not a big deal at the end of the day.
Source: https://www.notebookcheck.net/eGPU-Two-PCI-e-lanes-no-problem.266658.0.html