I am trying to get comfortable with buying a used 4 year old PRO4848 with V-Rails and low hours vs a new PRO4848 with the new linear guide rails. Could I hear from those of you with V-Rails and are satisfied with their accuracy and rigidity? I have only read comments about how superior the linear guide rails are but the cost difference is significant to me, so just trying to understand if it's really worth spending the extra money. I haven't really seen anything negative about the V-Rails. I will be using the machine for inlays and furniture so would like as high accuracy as I can afford. Thanks!