Hi All - I recently purchased a new DGT and it's great, BUT it has a HUGE problem staying in tune even a month on the strings. I tune it and strum an open G and D chord and it's already out of tune - usually the G and B strings but the D string can also be out as well. So, gigging with this is almost unusable. I've tightening the tuning pegs and locking pegs. Does anyone have any other tips or tricks to help this or is this just how it is with a DGT?