I did you one better...
You can see when the plastic piece is rotated into place on the clamp, it causes the clamp to move away from the frame slightly. Then you can see the "play" of the clamp even when locked into place, both with the plastic piece in place, and when the plastic piece is not in place. At the end of the video you can see just how far I can pull the clamp out before it finally disengages. I don't consider any of this to be a problem, however. It feels plenty secure to me.
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I guess I misunderstood, and thought you were RELYING on the plastic piece to keep the latch from opening. I see now you latch is overcentering just fine, and its your plastic "safety" alone that's the issue. Ok, yes, well my "safety" must be bit closer to the frame so it engages the latch arm decently with it full closed.
I agree with you
@RavingRoo...this is a non issue.
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As I read your posts, its clear your bikes won't be "popping open", but I guess I misunderstood the nature of the problem. I thought you guys were discussing a loose latching lever handle issue, but now its clear the handle is locking up ok, but the handle itself had play for some reason. I've rechecked my Ejoe Epik Se latch after I adjusted it on receipt .. and while it WAS a bit loosely locked what it arrived, once adjusted, its nice and tight.
The latch handle snaps into place with firm push of my thumb, and the is NO play in the latch handle! The plastic "insurance interlock piece" flips down and fits well, with its slot centered over the handle tab, with no contact either side. I CAN move the handle, but need to flex it a bit either way within the notch of the interlock slot.
I seems to me you guys can center up the plastic piece better by filing or sanding the inside mount surface so the slot in that part fits closer to the frame, and thus centers over the latch tab more accurately.