@lmlloyd - very interesting post. Similar to your experience, late last year, I had an early Form 3 that did not fully print models. It would only print the rafts. The rest of the model was just a thin wafer stuck to the bottom of the resin tank with other debris swimming about the resin. This required wafer removal and resin filtering after each of the first three prints I attempted and a call for help from Formlabs. Removing the wafers stuck to the tank damaged the tank. Formlabs quickly swapped that machine out and replaced the tank, too.
The replacement machine does not have that problem. It sounds like Formlabs was able to correct whatever was going wrong with our early machines.
New tech is high adventure.
The problem I am presently experiencing with the Form 3 printing in black V4 is that it takes a considerably greater force to remove black models from the build platform than gray V4 models. So much more force is required to remove a model from the platform that I am breaking 1 out of every 3 models trying to free them.
This has been talked about in other threads.
I’ll be contacting FL support. Hopefully there is a fix.