Is anyone else having problems with the 4 main relays inside the control box sticking open/closed? 3 of mine have been having problems. Most frequent issues are one that sticks closed and causes the system not to power up and/or think the e-stop is tripped. The other sticks open and the router won't turn on. I need to just replace them or tear them out and try to clean them (although I don't know how they would get dirty in a sealed box), but was wondering if anyone else was having issues.