it is very common... I dont drag bottom but I drop it to the bottom and bring it up 5 feet
I have only hung a ball once and it was on about a 20 foot tree... stopped the boat backed up and the rigger pulled the whole tree up
Speed right out of the box can be different if you don't reset it... If you are truly able to change speeds by .3 mph with you boat play around at different speeds and find what is best with your rig and use that as your starting point