While waiting for the IB tech to get scanned, I quietly resumed work on my project described on page 1 of this thread.
I still need to address the issues with scene transitions that are described above. I intend to use FCP to deal with the transitions, such as fade in the Mission San Antonio scene as per the pre-extended cut version.
Also, since the picture of the 2003 BD is slightly zoomed as compared to the Mondo BD, I thought I'd try splicing in the 4K BD footage. However, after converting the 4K BD to Prores 422 HQ and using it instead of the 2003 BD, I must say it isn't always a better alternative. An obvious reason is the color timing, but the image also tends to "drift" throughout the film as described by Andrea in another thread:
Ultimately, I'll have to decide which MGM source to use for the splice in question.
Lastly, the 1998 MGM LD audio does not sync perfectly with the 98 MGM DVD, which I found a bit surprising. This is even AFTER correcting for the DVD missing the footage of Blondie holstering his pistol. I will have to manually sync the LD audio to the DVD audio at this point.