Hi ShepperdsHook! I had the same exact issue, further complicated by the fact that I was using Groomable Splines instead of normal xgen-core guides. I found artofcharly’s videos extremely helpful, but still wasn’t able to get any of the three options he presented past the final export stages–they would always hang for one reason or another. If you’re still having this issue I can walk you through what I did for my project–it basically involves running one of the developer scripts charly provides only up to the point where rootUV attrs are created, then vanilla-alembic-exporting the curves for further processing in Houdini (or another alembic editor that handles massive point counts better than maya does).