@Drew, I recently created a thread that may be relevant to your higher-level thoughts regarding your HVAC
If you feel like posting your gas usage there it could be interesting to compare usage.
In the bigger picture of migration from fossils to all electric a major factor is quantifying real usage. e.g. How much gas goes to space heating vs hot water vs oven/range. For that reason I’m interested how Sense can be used to quantify fossil usage. IMHO it’s well worth getting an extra Sense (if necessary) to get ground-truth on the major energy users such as HVAC.