I've have a few pots that I use today:
Early 90s F2/F5 dark zini that the vendor noted
more porous and different than other purple clay. I use this once in a while for aged sheng. It's a bit small (75ml) but is a little too porous i think.
Early 2000s Hong Ni. Vendor noted
private order in an after Factory 1 manufactured, in Factory 1 classic shape and quality standard. This teapot is made very well from high quality red clay. I used this for young and aged sheng (I know pick one, note both) and I think it works pretty well. Occasionally accentuates aspects of aged sheng that you might not want. A porcelain gaiwan works just as well.
Modern Jianshui ZItao. Use this for shu. Works well, nothing special. Again, a porcelain gaiwan works just as well.
As noted in my earlier post, I am looking to get a new pot for aged sheng and would get a quality modern pot than hunt down an old factory pot. I've been looking at Yann Zisha Gallery and Yinchen Studio, both claim use of quality clay with no additives. I see a few things I like and would buy them and try them all, but that's not realistic. I get the tea selects the pot and not the other way around, but I would like to ask for general guidance here.
What are your thoughts about these pots here for aged sheng. If it turns our they work better for ripe or young sheng then that's a win too.
Yann - Di Cao Qing + Duanni I have concern that the mixed duanni will make it too porous and zap out the tea. Not much bigger than my dark zini above.
Yann - Lao Zini
Yann - Di Cao Qing this is a big jump in cost from the ones above. A little bigger than I would prefer.
Yinchen - Di Cao Qing this is half the cost of the first two, but probably lower craftsmanship