From memory; it inserts 1 1/4" to 1 1/2" into the board extrusion. The ends are not available from Polaris. So you need to either find a damaged board to rob it from, Or source it from guys like me that do not use the stock front mount. PM me if you need the mount as I'll be pulling a few more out here very soon.
As for cleaning: My choice is to remove the heavy Adhesive residue while still warm from removal. Followed by sand blasting for good surface prep. Short of that; remove the heavy adhesive and wipe with joint with acetone, assemble, installing the single rivet to maintain alignment and inject adhesive into the internal adhesive grove thru the adhesive injection hole. Let cure and reinstall, Enjoy!