Where do you position your block in your boat?

Under your knee and on your floor board.

Take a couple sessions to try and find the right spot in your boat for your block so
that your boat is balanced bow to stern. You do not want to be to far forward and dive
your nose, or too far back and sick your tail. Get a coach or buddy to look at you
paddling and adjust your block until your boat is ridding nice and level. Make sure to
keep checking the trim as you start going faster into the summer as sometimes a diving
dose not show up until you start sprinting. Different boat will have a different sweet
spot so take the time to find yours.