On the WAS board you can adjust the rate of fire cap through the trigger. On the new cricket boards (the stock board) im pretty sure the rate of fire is capped at 20.
Dwell can be adjusted on the WAS board through the trigger. On the cricket board there are two buttons on the side that you push to adjust it. One is to raise it, the other is to lower it. These buttons can be used without taking apart the marker.
For instructions on the steps to adjusting the dwell on the WAS board, you need to read the WAS board usage manual
http://www.wickedairsportz.net/manua...sagemanual.pdf