yeah the hole point to this is that bearing constantly fell out of my brake, so i designed and tested this for a while and now i am selling ti to other.
and as for the question about the lucky brake, this is designed to fit snug into as stock bearing, but depending on what type of deck you have you may be able to fit it onto that spring leg ex: will not for with phoenix an lucky brake, but lucky an lucky or pro ride an lucky, or an open backed deck.