It's now called a MARIS 900. It used to be a Plessey ACR430, but was upgraded last year with new heads and processors. For a 3cm radar, it's very good, even in rain and the presentation on 22in monitors looks almost like a real radar!
Siting of the bracket markers is the problem with the 'touchdown' issue on 27, because the head is so close to the threshold and would be even closer to the touchdown point if we were to move them.
Not sure about 'check brakes off', seems a bit of overkill really. In fact, I don't fully understand why we go through the process of checking all the extra bits on SRA's anyway...the info is all on the published plate, why assume that pilots flying SRA's are more stupid than others?