just 2c regarding the paddle using the bearings...
According to my experiences it is better to use the covered bearings instead of the open one because of the dust coming in will make issue after some time. You will need to maintaining the paddle more often compare to paddles using the covered bearings.
I used the Begali Magnetic Professional and except this task the paddle worked excellent equipped with short metal finger pieces.
73 - Petr, OK1RPhttp://ok1rp.blogspot.com