Hi am looking at buying the hollis hd 100 BCD am desciding between this and the new mares pro tech. Will be looking at slinging a 5lt faber pony tank on some deeper dives and shipwrecks as well as a standard 12lt faber back mount. If anyone got any info on the pros or cons on either of the bcds and any info on the best BCD to carry a pony would be great. Couldn't find many reviews for the hollis BCD so thought I would try here. Thanks