I would like some recommendations for a good retention holster for a Glock 26. This would be for open carry, so concealability is not a primary concern. An open-bottom holster would be nice, if possible, so I could carry a 17/19/22/23 in it. I am unfamiliar with the terms Level II and Level III retention. I would also prefer something that rides high. I don't care if it's leather or kydex. The only one I've ruled out is the Blackhawk Serpa (Paul Gomez's post in strategy & tactics made me look elsewhere). What do you all recommend? Thanks in advance.