Put in 21097m but wasnt sure if would do that also moved damper down to 4 from 5 as read thats a good setting....definately easier on arms and hands werent blistering....seemed faster stroke rate. Had black hawk down on....really good row no blowing at any time but kept going a bit quicker if dropped below 500m rate. Gps watch on heart rate in red a lot did ease off when got high but no blowing or strain. V pleased with another hm row.....bum got a bit uncomfortable.