I had used Atomtal when I lived in Italy and could not get Microdol X and A 49 was reported to the East German version of Atomtal, when Kodak stopped production of the 1 quart mix of Micordol I gave A 49 a try. I had to double the posted development times for most films I was using, just seemed flat, to get a really good shadow detail (zone II) had to expose at EI 100 with Tri X and Classic 400, and still had to extend development. The last box 4X5 and 120 of classic 400 I used Microdol X 1:3 and HC 110 with good results, I think D 76 would also be a good bet. I am now working with 777 and Edwal 12 with HP5 and PF4, my guess is that classic 400 would work as well once you have EI and times worked out. I understand that staining developers work well, but I dont use pyro's.