has anyone had any problems with this machine ? i have had it about 4 years the main circuit board went out after about a year and was replaced under warranty it just went out again and a replacement is about a 1000.00 dollars and i talked to lincolns tech and we figured out what caused it but since its out of warranty couldnt help me on price unless i had a invoice number from the warranty repair. well our local shop changed hands and says they dont have the records .any ideas on where to get a better price on a replacement board.