all i can tell you is what i would do. which may be different from what someone else might do. i'd give it a light hot wax and detune the contact point areas. 45 minute job and the board is squared up for quite a few days. i've sold a couple of these and did it for free as part of the deal.
no special tool needed for sharpening magnatraction edges.
Try this trick and spin it, yeah
Your head will collapse