500 microns that's 20 thou or one and a half 1/64" or to put it in simple terms 10 hair widths you will be able to drive a coach and horses through the gap. Think of the loss of performance Chris you will never be happy with it.
joneb wrote: 500 microns that's 20 thou or one and a half 1/64" or to put it in simple terms 10 hair widths you will be able to drive a coach and horses through the gap. Think of the loss of performance Chris you will never be happy with it.