Hey Mike, welcome back. I took a 4 year hiatus. Sold off all my older model Boaphile racks as well as the large style Animal Plastics brand. I used those for most colubrids but had heavy 3.5' wood and glass enclosures I kept adult pits in. I hear some are using the Iris tubs within rack systems with much success. I believe Boaphile, Animal Plastics and Monster Cages all make a good rack for those tubs. I though may go for enclosures in the 3' and 4' sizes. I believe Monster Cages will custom make any size you want.
Russ P has some nice black pines. I actually contacted him recently in regards to them. He also sent me a link to his enclosures on kingsnake. He made his own. They look to be a pretty good setup for pines. I may revisit this. He also acquired some very nice sized tubs that he will be building a rack to contain.
There are some people working with very nice TRUE locality mugitus. Being that I reside in Florida though I am somewhat restricted with doing much with them. Morphs though are open game. Only one morph that interests me and it is those high red speckled albinos. Hard find these days.
Welcome back and I will keep you updated. I'll make sure to keep my eyes out for your black pine pics.