I figured out my problem. More research revealed that stone producers make fruits on low nutrition and stones on high nutrition. I looked at two tamp plates left over from another project [on MYA with double the Y] they are forming stones in just half the time these 34 other transfers have had.
Well I got a chance to sector these out, ditch the poor performers, and emphasize the hyphal knotters. Now I'll just put them on the correct media!
I'm glad I started a bonus MS grow. Two jars for fruiting, 98% colonized. Two jars for stoning, 98% colonized.
Funny thing, I just realized of 17 plates of this coffee wheat extract agar there wasn't a single speck of contam.
Is this just the case for AGAR? It seem like any sort of grain spawn, or even a weird "cake" of cardboard and flour is a high nutrition and will make stones.
Nice going sucess rate! Have you surveyed these ones stones and fruit before?
Im planning on getting tampanesis going to survey the mycelium activity. According to an comment on post a few years ago by soliver, the mycelium is active too. Would be something cool to check out.
Thanks for sharing newmoon and Elrick.