KS ARG released another series of parts for the MDR/MDRx/WLVRN design for anyone interested.
Magwell Flair:https://www.thingiverse.com/thing:6600190
https://imgur.com/a/FyQ2qnO
This one adds a larger flair on the magwell as well as resolves the lack of a flair when using the 5.56/300blk magwell insert, primarily for the go fast competition people who are doing shouldered reloads. Works for the MDR/MDRx/WLVRN.
New FE to SE Side Plate V5https://www.thingiverse.com/thing:6600206
See the image below for details, This design removes the rear tail, improves the strength of the forward claw, improves the strength of the rear slider, uses a smaller and lighter spring for ease of install, Updated Spring Guide, Increased strength Switch, and improved dust cover retainer. There is also a blank plate option for those who wanted to be able to change SE panels without a screw driver.
Old v4 images for comparison
https://imgur.com/a/byXnXiL
Brass Catcher for V5 Platehttps://www.thingiverse.com/thing:6600211
https://imgur.com/a/oV4gmL0
This one is a bolt on attachment to the new FE to SE Side plates