Jet Tools - IBDG-436VS Variable Speed Bench 4x36" BELT & 9" DISC Sander (577634)

We purchased this belt grinder just shy of a year ago. The inverter burned up about 3 weeks after purchasing it. We contacted JET and they sent another one immediately. That inverter lasted about 2 months of light use and then it burned up as well. I contacted JET again and they sent me another inverter. That time it took a while (less than 2 months) for the board to come in. That inverter lasted about 2 months again and it burned up. I contacted JET again and described the issue we kept having. They agreed to send yet another board to get the grinder going again. I also asked if it would be possible to get the grinder exchanged with one with just the on off switch. They referred me back to the company I initially bought it through who I contacted. My vendor was told by JET that they do not have issues with this design and that they would only send another board.During this process I tore down 2 of the fried boards and each one showed that metal dust had been sucked into the base of the unit and blown over the inverter boards. This had caused different components on the boards to short out causing the failures. Simply a bad design.... Jet will NOT admit to this issue even though when you search the reviews of the grinder now there are many people reporting the same failures. The machine itself works wonderfully for us and would be exactly what we need except for this issue.I am now going to try and make a tube pedestal style base that seals to the bottom of the grinder with vents down low so that no grinding dust can be easily picked up from the table into the base of the unit and blown over the inverter board. If that doesnt work I will try some form of conformal coating on the PCB... Hopefully I can come up with a solution.