i haven't had any issues or anything break on my G2 so far. hopefully your RMA replacement is a good one. i did buy a 3d printed face gasket for mine from a guy on the G2 facebook page for wider FOV and it works great. i also ordered the VRbrothers rear piece that has an adjustment knob on it from amazon. it's not here yet though. i miss the tension adjustment knob that my samsung odyssey had on the back of it. i have also been using the mamut gunstock with the mamut dx grips, but i had to modify the grips a bit to work well.