I bought a boat from Eberlin boats last year and have been having trouble with bumping my shoe or rocks logs etc where my friends boats have no problem. When i trim the motor all the way down the leaded edge of the shoe seems to be level with the bottom of the boat. Is it possible that it needs to be higher? There is however a shim in between the motor and the transom to allow the motor to trim down further(per eberlin) could this play a factor as in, when i trim my motor up when on step that its not actually gaining as much clearance as it would without the transom shim?