On the point of the label indentation, yes, some would say the record must be supported underneath 100%. And if there is no indentation, the record will only be supported at the center leaving air underneath. Now, without the indent, consider that the mat damps the platter and to some extent, the record as it touches the label area. This doesn't have to be a bad thing. I have found that it can open up the soundstage, increase dimensionality, increase air, speed and tightness. It can reduced bass and weight. Try it and see.
