Hi Peter, I’ve seen a few Hollis SMS 75, they seem to be a nice rig. Just remember no one sidemount rig does it all, their are a few that come close and possibly the Hollis SMS 75 is one of them. It all boils down to what you intend to do with your sidemount rig. I have several different rigs that I use. If I’m going in tight stuff then I use a rig designed for that purpose. If I’m hauling a lot of stages then I use a rig that has lots of lift. So for the type of diving you plan to do you should look at all the variables to find a rig that comes close to your diving needs.