I would not be too concerned about the overly long cummerbund in the trunks or wetsuit configuration. Most cummerbunds also have a Velcro connection that lets you take up on the gross excess to get you into a good working range.
As for the regulator coming back to hit you in the head when the tank runs light several things come to mind. How much of a backpack does that think have? with only one cam strap the cylinder may not be all that stable regardless. Most aluminum cylinders tend to be bottom heavy with thick bases. While the cylinder will become buoyant I'm thinking that it will have a valve up bias. How snug did you have the BC cinched? The upper body should have had a close but not constricting fit. The cummerbund should have been extended before before mating the Velcro. this will feel a little tight when out of the water, but will feel fine once diving. At depth it's the preload that lets the cummerbund compensate for the suit compression at depth. That's the principle of the depth compensating cummerbund.
My biggest concern is where will your weights go? I'm not a proponent of 100% integration to begin with. Secondly since you are in MI with drysuit intents there is a chance that your weight requirement will exceed the capacity of the BC. In the pictures it looks like your hips are lost under the BC so forget about wearing a weight belt comfortably or safely. This can be handled by wearing something like a DUI weight harness below the BC. Be sure to thoroughly consider your weighting plans.
Pete
As for the regulator coming back to hit you in the head when the tank runs light several things come to mind. How much of a backpack does that think have? with only one cam strap the cylinder may not be all that stable regardless. Most aluminum cylinders tend to be bottom heavy with thick bases. While the cylinder will become buoyant I'm thinking that it will have a valve up bias. How snug did you have the BC cinched? The upper body should have had a close but not constricting fit. The cummerbund should have been extended before before mating the Velcro. this will feel a little tight when out of the water, but will feel fine once diving. At depth it's the preload that lets the cummerbund compensate for the suit compression at depth. That's the principle of the depth compensating cummerbund.
My biggest concern is where will your weights go? I'm not a proponent of 100% integration to begin with. Secondly since you are in MI with drysuit intents there is a chance that your weight requirement will exceed the capacity of the BC. In the pictures it looks like your hips are lost under the BC so forget about wearing a weight belt comfortably or safely. This can be handled by wearing something like a DUI weight harness below the BC. Be sure to thoroughly consider your weighting plans.
Pete