BDgregory would be correct, however the Iron Audio acrylic platter does not have a LABEL recess machined into the top surface so if you do not use a mat of any sort, the record will not sit flush with the playing surface. Iron Audio recommends the use of a mat.
Rega spindle too short
I have a Rega Planar II and I have recently upgraded the platter to an Iron Audio acrylic platter. The table sounds great, it seems to have a more refined and deeper soundstage. The only problem, if it is even a problem, the spindle from the subplatter only sticks out about 3/8" and after I put the mat on I only have about 3/16" above the record. I am wondering if anyone else has encountered this and if so is there an upgradable sub platter with a longer spindle? Thanks in advance.