I do have some comments about the fitting.
I hope that the boots you ordered are wide enough to be comfortably molded to your forefoot. If you are broad across your forefoot around the toes (as I am) your fitter will want to put some wrap around your toes to expand the toe area enough for you. The Vacs are narrower in the toebox, and it you don't do that right you will be miserable - I know.
If your feet are more than 106 mm. wide, then you may be in trouble, or he will need to mold the forefoot at very low pressures and hope for the best.
You will find the Ranger 12's to be a softer boot, probably less stiff than your Speedmachine 110's. I found my 120 hybrids to be close to my Salomon XMax 100's in flex.
You may still need punches if you have bunions after molding, unless your guy pads you well there before molding.
It is likely that the Vac boot will mold well to your instep. You will be surprised how well it conforms to the shape of your calf and the taper of the calf down to the ankle. I found that made the boots very sensitive and responsive - that part was a pleasant surprise.
Do you have a good quality custom footbed? If not, take some of that money you are saving and do it with your bootfitter before he molds the boots. Doing that will up the performance of this (or any) boot. Do an alignment as part of the custom footbed.
I hope the person you are dealing with is a very experienced and knowledgeable bootfitter. If so, he can really optimize the boot for you.
The vacuum stand is really an important part of the equation. You will want to pay close attention to your stance width when molded. Be sure that it is where you want it when molded, and don't be too narrow, or wide. Your stance angle is also part of the process, and that is molded in. I suffer from excessive dorsiflexion, so I benefit from a more upright stance. That has a performance benefit also, you will feel more over your feet.
As you may know, there is a difference between canting and cuff alignment. Generally, it is better to cant at the bottom of the boot with shims or removing material. Simply molding the cuff alignment may or may not give her everything she needs. He should check her for canting and do what is necessary. I don't think that simply molding the boot will be the complete solution for everybody.
Pay attention to the details and it can be a great boot. My guess is that you will find it a cold boot, everybody else seems to.