Dear Dave & Harold,
Many thanks for the feedback. Looks like I may have been premature and unfair in my summation and perhaps should have tuned the Resomat a little? ;)
It may be that subconsciously I was thinking of the effects of offset centre hole drilling (which can be 2mm or more) meaning that the spikes would enter the actual playing area of the disc :O
This thought "creeps me out" slightly in the context of adding weights or clamps, even though I was fairly comfortable with the basic weight of the LP on the spikes.
;)
I know from experience that vinyl is a lot tougher than it looks. Have you seen any evidence of indents after applying pressure? (Dave?)