Ordered my Obsidian 45 a year ago, stamp finally came and I'm a bit lost on the ideal current solution to mount. I had done a lot of research at the time, but that was a year ago. I have a gen 1 Scorpion Evo pistol and a carbine length hand-guard sitting around that I had ready to go. I'm needing to pull the existing hand-guard off - so the plan was to use the HB industries carbine barrel nut tool so I could both loosen the barrel nut in pistol form and tighten it in carbine form. However, HB says the pistol is 21mm an the carbine is 20mm? Do I need both tools? Also, mounting the suppressor. I had planned on using a three lug of some sort. With that in mind, I am needing the Obsidian 45 3 lug adapter and a 3 lug barrel attachment. I think I read a while back about fitment issues and potential baffle strikes with certain 3 lug combinations. Is there a preferred, working combination at this point? Thanks.