Grist is Great! Make.com integration is too but small help on upvoting a Grist module fix on Make.com is needed:
The Make.com Grist module has hard coded getgrist.com URL for integration while custom URL would be needed for custom setups. Make (or Grist) users, please 
upvote 
https://www.make.com/en/app-improvement-ideas/p/custom-url-input-field-missing-on-grist-module