I have a spare G-35 and I am also thinging of using it for an entry platform to Open. You may add cost in there as a reason as well. I have a barrel and comp on tap and would use an oversized barrel for 9mm major in the G-35 frame. Trigger,guide rod and recoil spring, mags and mag funnel from JSC. Now, I want to mount a red dot HUD on the slide to push it close to the bores axis. Lone Wolf Distributiers has several methods to accomplish this by different type of cuts to the slide. See LWD: My link.
The Burriss Fast Fire II, Doctor, J Point and RMR are all sight prospects. I have Several concerns, most of these sights only offer a 4 moa dot, i'm thinking 8 moa is a better choice. Also, since the sight is mounted to the slide there is additionalsight movement to manage as it archs up (normal) it moves from front to back with the slide? Any real problems here? Further, the slide bangs back and forth with a lot of energy, just being open, will the sights withstand this abuse?