No problem, Chuck -- thank you for the trade! Please let me know how the frags do. You can super-glue the mushroom to a rock, I left a little bit of rubble attached to the foot of the mushroom so you can use that. But if you put it in a low/medium flow area on top of a rock it'll attach itself in no time. It should open up to 2" to 3" in diameter.
A big "thank you" to Chris for helping make the trade possible.
Nuno