I didn’t/don’t have the laptop stand on my Crossfire. First thing I tried was get the laptop as far away from the table, and the plasma cutter power supply as far away from the table in the opposite direction. But found the USB cable my issue.
I think that the multiple possible issues and solutions might be why Langmuir put the Lotos units on the 'Not Officially supported"…but probability will work list. They don’t want to have to support the multitude of problems they can create. With Electrically noise equipment each unit will create it’s own challenges. I’m also sure that for the price we paid for the lotos units many of the parts in them are parts they can get at a set price. So the tolerances vary which means out of 10 units 2 might not create any more noise than other companies units. 6 might make a little bit more noise and 2 might make your neighbors radio rattle. You will never know which one is in your box till you fire it up.
But Sharing the problems we see and how to resolve them helps the next guy with different steps to take to fix theirs. Keep adding to this thread as we go.
I will add anything I find out when the Pro gets here. I got a unit with all the bells and whistles (a laptop tray too 
).