Polo GTi Turbo - Exhaust resonance?

[Jeff GTi]

any modified gti turbo owners find they get a tiny bit of resonance or best described as a mild form of vibration through the front floor pan at about 1700 rpm when accelerating from low revs or cruising at these revs

i have got it since upgrading to the milltek full system and im told its just a bit of resonance in the downpipe as the turbo can spool up faster now?

does this sound right as the bore has increased from 2.25" to 2.75"

anyone else had similar or had any joy getting rid of it, as i say its only since the exhaust has been put on and the cars been checked hot and cold and it aint fouling anywhere

iv been informed as uprating the lower dogbone mount may help this as it will reduce engine flex at the downpipe off the turbo

also, some folk off cupra net say it may just be the map needs tweeking to accomodate the faster spool up and it may be this, but i dont wanna be running stage 2 software without a front mount (or is it ok to?) as i cant afford the cooler kit

any help much appreciated

jeff