A. Following a careful analysis of the 2022 CYOA racing season, a few refinements to the formulae and factors used to calculate ratings have been made for CRF 2023:
In CRF 2022, mainsail and spinnaker girths were used for the first time in calculating ratings for boats that declared them.  For 2023, the sail areas calculated with via those girths (widths) are used at full value.  As a result, the ratings for a few boats with aggressive mainsail roach profiles and/or unusually broad spinnakers will be sped up slightly.
The ratings for boats whose Rated Draft (RD) is greater than their Base Draft (BD) are slowed up, typically by 1 sec/mi or less.  The ratings of a handful of centerboard boats with unusually deep board down draft are slowed up by considerably more.
Boats with high stability (e.g. 12m’s) were observed to be advantaged in 2022, so the Stability Correction (StabC) for boats with high ballast/displacement ratios has been increased, speeding up the ratings of a few of these boats by as much as 6 sec/mi. Most vintage and Classic boats are unaffected.
Boats that are either heavy for their length, or that have low sail area for their displacement (or both!) were seen as disadvantaged in 2022.  As a result, the Displacement Length Factor (DLF) has been decreased for heavy boats, and the Sail Area Displacement Factor (SaDF) has been decreased for boats that a\\re low on sail area. Taken together, these changes slow the ratings of typical Vintage and Classic boats by 2-3 sec/mi.  The ratings for a few especially heavy CCA and Universal Rule boats are slowed by slightly more.
The rating gap between sloops with wooden vs aluminum masts has been closed by about 2 sec/mi.
Taken together, the changes in rating resulting from all of the above refinements are on the order of 3 sec/mi slower for most Vintage and Classic boats, with some heavy CCA and Universal Rule ratings slowed by a bit more.  Boats with unusually high stability will rated faster by 2-3 sec/mi.