I’ve regenerated the above charts and updated the proposed configuration to (-0.3, 0.03, 7). With the previous version, there was a minor issue with how the rates were annualized.
Given that we have 28 day bonds, and the oldest tranche in perp gets rolled out 7 days before maturity. On average it takes 21 days to rollover all the tranches in perp once. Which means, there are roughly 17 full rollovers every year.