Also got it belted up, but found out afterwards that I used a grease that is controversial on the rails (superlube with syncolor). It's recommended by LDO and Nero3D uses it in his video, but many folks on the Voron Discourse say it's a no-go. I'd rather not risk it, so I'm uninstalling the rails, cleaning/degreasing them, and reapplying some white lithium grease.
If you have the printed parts already you can try installing one now to see how it goes, especially if you have the gantry off right now.