hubstack nub alternatives

just wondering if anybody on here has figured out any easy and/or nice/nicer looking alternatives to the nubs that you can buy for your hubstack posts.

Something easy would just be a bunch of o-rings. If you have access to some type of metal lathe you could turn some plastic or metal attachments to them (make them look like side effect spikes or something). Not sure how you would attach them without adhesive, but you can figure that part out :wink: