I have an old Cat 242A with standard flow. It hydraulically handles a CID 72" HD with push bar on it. But weight wise, this 2,000 ROC machine likes to stand on the front 2 wheels pretty easy. While the cutter is well within the ROC, it is a lot farther out there than a bucket. I often use my OTT steel tracks (which weigh about 500#) when I use the cutter. They help hold it down.
If I could, I'd trade for a 60" myself. Think that'd help a lot.