Yeah, the few times I have had that TLR-1 out there on the forend at 3:00 become an inadvertent, surprise handstop, "unpleasant" was the polite euphemism. Wasn't sure how a more rounded form at 6:00 would work in the long term though I currently have a jones for a 6:00 light... probably not that well. And because I am not a short barrel user, I don't really need a handstop to keep my fingers safe.
I'm not too sure switching to a Magpul M-Lok MOE forend isn't merely a lateral move except for being able to mount a light on either side and being easier to add grip tape to if I decide to do so. At this point, I am seriously considering leaving well enough alone and keeping the GG&G "modified Davis/Speedfeed corncob" forend but getting a low-profile cantilevered mount for an extra scout light I have laying around (and ditching the TLR-1 as a shotgun light).