IMHO, anyone complaining about reliability with a current-production Raven is most likely a newb who doesn't understand the Internal Piston operating system, nor the concept and purpose of an adjustable gas flow. 90%+ of the reliability "problems" that I have seen reported were the result of an improperly balanced operating system. Follow directions, sort out the Gas adjustment and suddenly those reliability "issues" disappear. Go figure....
As for Lockhart's parts pricing, I defy anyone complaining to do better in today's economic climate where everything costs exponentially more with each passing day. Machinists have families that have to eat also. Their labour doesn't come cheap, nor do the machines that they operate. 3D-printed aftermarket parts are all well and good, but they cannot match the look and precision fit of Lockhart's machined and anodized Left Side Cocking-Slot Cover and Casing Deflector. Both are machining excellence. The Casing Deflector also houses one end of the Dust Cover Assembly if you are inclined to install one of those, so there's that aspect to consider also.