My last sumping experience with my 3rd 117 Stage IV engine was precisely measured to determine the amount of oil in the crankcase. It was boiling oil (whatever temp syn 3 boils at) and there was a measured 44 ounces that came out of the crankcase position sensor. About 1.5 qts.
Heatwave Friend, you are the correct man! I have always read your reports in this forum and in CVOHARLEY, I tried to buy a RGCVO 2019 and two HD dealerships did not sell me the CVO claiming to be problem bikes, so I bought a RGS2019 and now I'm with this RGS and a RKS with problems in the my garage, before buying I should have gone your way.
On another site there is a guy who had his sump twice. He started running it a quart low and he said that now he can't make it sump.
There may be some truth to that. When I was at Fuelmoto last week they said they never had or saw a bike that sumped. They also said that they always run the oil level about a 1/2 to 1 qt low and thought that it may be the reason.