Arca plate for Hasselblad tripod mount ring (75mm)

[SeanRL]

Has anyone found an arca plate whereby both a 1/4 and a 3/8 screw can be engaged at the same time with this tripod mount ring?

I have a plate attached with just a 3/8, but it twists with heavy lenses. Plate even has a sidebar, but it's not good enough for a 3+ lbs lens.

TIA,
Sean

[JCM-Photos]

If the plate slips on the ring foot it's a problem of metallic surfaces finish.

I had the problem with a plate with a pure metal face on the chrome base of the 907X,
I solved the problem by putting between them a piece of very thin cardboard cutted to the size of the plate, it is very efficient.

[SeanRL]

Thanks for the suggestion. The plate I'm using has grip - a rubber material.

[DJPixelMan]

 I have an H6..but I had a similar problem on my Manfrotto plate. Kept slipping up or down when attached to the camera, there was no rubber or whatever padding/cushion on the Manfrotto baseplate between the baseplate grooves. I put a couple of layers of electrical insulating tape onto the Manfrotto baseplate, and this fixed the problem nicely.

[ashdown]

I got the 3 Legged Thing QR7 Plate as it is a good fit for the tripod ring, has a rubber grip and is Hasselblad orange (more or less). I was intending to drill it to replace the Hasselblad plate but then realised I'd have no screw thread if I ever needed one, so I just screwed it in. I haven't had any problems with it slipping but if you only ever use Arca clamps then you could drill it to fit as I originally intended.