I completely forgot - sorry - and thanks for the PM.
I haven't used it once.
To make a long story short, I was not thrilled with it and a bit underwhlemed, probably the first Malkoff product I can say that about, which doesn't even fall into the category of high-tech at all, more like clothing I suppose.
The first big apparent problem, the loop where you stick in the light, some MD series, is velcroed to the headband itself. My MD2 lights are heavy. M61** series modules are heavy, the Li-ion batteries are heavy, the bodies/bezels/taicaps are metal. I can see where if you bend at the right angle or move suddenly, or if you are under the car, and snag the light upon something, the velcro will disengage and your MD series device will fly to the floor. I was kinda shocked to see that flaw in the design, and I don't know why you would need the velcro at all, to remove/reinstall the light onto the headband. I have many lights and don't have a problem dedicating a full time light to this headband.
This problem can be remedied by sewing the piece that is velcro'ed to the headband. I should not have to do that, given what it costs, make some mods to it. I need to locate my needle and the thread - they are laying around somewhere.
But there is a bigger problem that I don't see a remediation for. The headband is not adjustable, incredibly. There is no way to adjust either the circumference either the horizontal band or the vertical one. Therefore, one size fits none. That is really bizarre and does not accommodate various situations. For example in the winter you may wear it over a hat, in the summer, without a hat. The size it came in, is a bit loose for me. I will try it over a hat and maybe end up with a better fit. So I was really surprised to discover this lack of thought into the design. That and the Velcro'ed piece just doesnt make any sense.
I will toss it in the car and probably load it with Surefire G2x Pro, which is the lightest light I have, I think. And load it with primaries which are even lighter. I will also try a 2xAAA cheapo light I have, it's not compact and may end up a perfect fit, so if I drop the thing, no concern about damage.
In short, the headband needs to be completely redesigned. Nice try and high quality but full of bugs. I am not putting any of my expensive MDxx / 6P lights into that contraption for sure.