It Broke !
I went on break, came back and the IR tubes wouldn't relight. I have been careful not to shock them. I called the company that markets The Silent Paint Remover and they offered free replacement of the tubes with a 2 day turn around. I am not sure if it's a fluke or the nature of using a fragile heating element in a tool that moves around all day.
There is another IR paint remover called the Speedheater and it uses tiny shock springs on the tubes and sockets, and costs $300 more than my unit with some tools thrown into the package.
I only have a 3'.3' square left to strip of a 30'x10' porch floor.. ug.
That's good that people are able to get the home loans moreover, this opens new opportunities.