That's really sad to read Bkdoss...
I never had the chance to fly an acft equipped with a Collins version of a multiscan radar, but I was hoping they had developed a better product.
The RDR-4B is a far, far better radar. But that's only my humble opinion !
* As a matter of info, as we approached the weather depicted in the image above, we took the same path of the guys ahead of us. We switched to manual and set the scan level to something like FL300, where we still had some green returns... Guess what ? Not even a light chop as we went thru ! *
All the best !