My husband opened a dental lab approximately a year ago. He has been trying out Valplast for a while now, and even went to NY to take a class (we are in Oklahoma) Today, NOTHING seemed to go right- Anyway- he is at his wits end, and there is nothing I can do to help, but try and find someone else who has an answer. This is what I know: lately, there has been an issue with an open vertical after injection...?!?! I so appreciate any Valplast experts that might be able to pass along information! Thank you, thank you, thank you!