I've never used the UDM but if it vibrates as bad as the
PC there is no way I'd use it.
If you are used to using a Makita why go with the UDM? Seems like taking a step back to me...well just wondering that's all. DA's have a purpose but I rather use a rotary.
As far as eShine refunding you...not sure how that's going to go but worth asking, you never know
