So apparently one of the locknuts on the suntour barcons i installed loosened up and liberated itself from my bike recently. Luckily, I had another spare set I pulled one from.

Does anyone have tips for preventing this in the future? Just check them every week or so for tightness?

Anybody have tips for actually tightening them? With the screw sticking through the middle it gets difficult to tighten them with a regular flathead screwdriver after a certain point, I've had to use a smaller one to only fit half the head and I've already chewed part of one up trying that out.