R41 is directly connected from the sweep of the horizontal size pot to pin of V12. As show in this photo, it is the original factory connection. Yes, I did replace the pot.
Adm 17T12 5017 by
H Boyars, on Flickr
Also, since the question arose about some voltage data, here's a full run done last night. It's basically the same as it was in 2020 and 2018.
Adm 17T12 8910 by
H Boyars, on Flickr
Thanks once again.
Winky