Hi BD, thanks to you ! To answer your questions, my routines can take half an hour, though time flows very fast because I enjoy them. It depends on how early I wake in the morning, privacy, web distractions, etc. Frequency is low - once or twice a week, never more.
Cockrings I use are generic bricoleur items, chromed brass I think, about 0.25” thick, 1.50” and 1.75” inner diameter, worn on cock only. The smaller one is now too tight.
I’m not a measurement freak, length is about 8.5” BP (I’ve lost a bit with girth routines) and most important is to keep slim to limit the fat pad. Max girth is more than a Red Bull can, but less than a slim Coke can. Head circ. is 6.5” maximum, but I’ve seen bigger, so I want to get it to 7”, and I’m currently experimenting some impact exercises.