Their newest addition to the range is Nano Edge, specifically designed to improve definition of the Orthopan UR emulsion.
A companion product is Nano Grain, that is an improvement on Adotech. This test focuses on the Nano Edge developer.
But because DT mentions Spur developer you probably found the right one. Back-check via Freestyle, I'm sure I saw it there. Probably going to buy some, actually. (Buying, after I just bought a crapload of Eastman 5222...)
Got the Tech Pan juices flowing, do you?