This source is too small to be able to provide an improvement to the existing cut, I'm afraid.

You're correct. I wish there was a better source available online. The current Marcus cut is outdated.

I appreciate the quandary, but it's not worth spending time on this source since the resulting cut won't be an improvement, needed as it may be.

Have you looked at the tips in this thread. It could be that a bigger, better different source is available elsewhere online or that a bigger version of this same source can be found