While I don’t have direct experience with this particular magwell, I do have experience with two different magwells for the standard Compact grip modules - One that just attaches with a screw through the bottom of the backstrap and one that attaches with a screw and epoxy. I no longer use the one that supposedly only attaches with the screw, because it would slip off the front of the grip module after only a few rounds every time I took it to the range. The epoxied magwells have been on both my RS320s for a combined 6,000+ rounds and haven’t budged.
Since the grip modules are easily replaceable inexpensive components, the risk of permanently attaching a magwell to one is significantly reduced compared to other pistols where you’re attaching it to the actual frame of the gun.
I’d suggest not dismissing a permanently-attached magwell immediately, is all I’m getting at