I had to have my 1730 repaired. I contacted one repairer, who said the fault could be rectified at a cost of £150 approx. However, they went onto say, if they couldn't fix it, they would have to send it to Megger. Meggers default fee is £220+carriage+vat (which includes non documented calibration). Sent it to them on a Thursday, and got it back on the Tuesday. So it depends on how long you can do without your MFT.