I found 777 rather soft for my taste, Edwal 12 is good in low contrast lighting, very easy to blow out the highlight, it main use was for copy work. I found that MCM 100 (Miniature Camera Magazine) to have the best balance of tone, (contrast) and grain. At $60 a gallon I had stopped using it, but could not find another developer that suited my taste and works as well with Ultrafine 100 and 400. I use the replenishment regiment recommended for 777, had my last MCM and Edwal 12 tanks going for over 3 years. Regret tossing my last tank of MCM 100 out now I have to start over. BTW, all of the p-phenylenediamine developers are toxic, use gloves, apron, and safety glasses, keep out the reach of children and pets. Development times are on the long side, most medium speed films are around 13 to 14 minutes, fast films in the 18 to 19 minutes range at 70 degrees. If developing sheet film in a large tank I would add a another minute.
BTW the version that PF sells is NOT the same thing as what BGP sells. It is a "secret formula" and when I have contacted BGP and asked about it, they would laugh and say "that website article" ( at unblinking eye ) "isn't even close".
If it's a secret formula we don't know if it's the same as PF sells or not. I recall that PF got a sample 0f Blue Grass's version and analyzed it to develop their version. But no one is taking. What I would like to try is Edwal 20, no one seems to know what Gardal is, my guess it's maybe Catechol.