About Compatibillity and issues I have seen so far, with or without Reflexion Fix:
Around early March: IL-2 1946 4.101m/SASModact 2.72: working/no issues seen in stock Emils
While upgrading to HSFX I tinkered where this bug came from, as I had no other POV or Cockpits installed, Antos Bf109 where already in. It only happens to the Stock Emils, all modded Bf 109s are clean.
April: IL-2 1946 4.101m/SASModact 2.72 for HSFX 5.01: working/Stock Emils 4/4B/7/7B/7Z cockpit view Bug, Artefacts
Today: IL-2 1946 4.101m/SASModact 3.0+3.01: working/Stock Emils 4/4B/ cockpit view Bug, Artefacts/Emil 7s get me a Freeze on 100% mission loading--- in this install they are the lone 109 related Mods so far
Sorry to say but in HSFX 5s and Modact 3s it can be solved by removing the Mod, very sad, it's a pity.
I use Forgotten Countries in Modact 3.01,
Artefacts seems to be attached to view position, remains of the Canopy frame, it moves as you turn the mouse in Gunsight and Normal view


To sort out the Bug Phlegethon (uses UP201 4.09), TK_Yamato which one do you use? Are you experiencing this Bug in stock Emils 4 and 7?
Cgagan, now for you my friend. I used to have the 2.72 Modact for 4.101m running, I could activate them in MODS and/or via JSGME (folder structure, add correct .ini, but this is not recommended only hardcore), it worked both for me.
Maybe you have other Mods installed that make mess?