puredrifting
Major Contributor
The yoke on this unit is in fact a metal yoke with all metal parts including the clamping handle which is metal. What's wrong at the moment is that the surfaces between yoke and fixture are too smooth. Getting a yoke to stay in place is quite an art actually. Its not as simple as having a metal yoke and a clamping handle. You need some uneven surfaces in contact with each other in the area of clamping. The more uneven, the more you get a good lock. If the surfaces are all fairly smooth, you won't get the sticking action you're looking for.
Richard, you are a connected guy. What you need is the same type of grooving that the tripod head manufacturers use on the tie down knobs on their pan bars. It is a round, serrated gear cut with teeth and when tightened down, it will not budge. I would easily pay an extra $50.00 just for that feature on your light.
$999.00 is still a steal obviously. As long as the light is reliable and reasonably quiet, I think you will sell a lot of them. A 575 HMI is a very versatile instrument and I would love to have a kit of two of them.
Best of luck,
Dan