Just a tip.
I don't know if anyone else has this problem.
On the Silent Halo Shield for XLR-250 Kill-light the front of it kept getting oval and restricting the amount of light coming out.
I had some 5 conductor thermostat wire with the brown outer insulation, I cut a piece and made a circle with it and tucked it under the flap.
Now it's perfect and can't collapse.