Delivery up to speed in the end? What are you asking? Delivery time for the product? I do not know how many they delivered. I know when I was there I saw hundreds of Red Mounts ready to go.

I received my Birger EF mount and it worked great. A couple of times I went back to help dialed in a few problems, but that is always the case with new product. Birger responded and corrected the problem.

The Red Warranty problem was not a Birger problem from my understanding. Red did not like the fact that someone beat the to the punch and had a mount that worked with Canon EF glass. They wanted to sell their glass. So they cut the string which was not very nice, but to be expected in the nasty world of business.

I'll assume they were able to met demand. Just there was a huge RedUser thread around the Birger mount, which seemed rather confused on occasions.

RED seems touchy about the IMS mount as well and it seems to have a less intrusive fitting than the Birger.

Brian I have no idea if they kept up with demand. It sure looked like they were ready when it finally hit the market. I know there was a long delay and no communication while in the build process.

I bet Red has done a nice job on all of their mounts. I have not stayed too in touch with Red, but will keep an eye on the Scarlet. Be nice to have high frame rate 2/3" to match my PMW-500.

And sometimes the expensive solution does not hold the lens securely to the mount either.

I bought a new Letus Canon FD mount, for their Letus 35 Extreme, that would not securely lock the breach mount ring on any of my half dozen FD lenses. The "locked" lens would cheerfully unwind as I handled the camera. And this wasn't a cheap adapter or a third rate vendor.

Before I lost a lens, I fixed the problem with a couple of careful hammer taps to one of the mounting ears on the adapter.

I guess the moral is - whatever you buy, test, test, test. Anybody can screw up sometimes.