Need advice: 5 year VS. 6 year plan for Bible/Hist/Geo

I’m excited to be using nearly all SCM for the first time this year. My kids are 8th, 5th, 3rd and a 2 year old, and this will be our 2nd year of homeschooling. My question is in regard to my oldest who has 5 years remaining before graduation. Last year we did Modern American history using Truthquest for young students. This year I am planning to start us all at the beginning–Module 1 so we get a great flow through history, and a great biblical foundation. I was bummed that my 8th grader would eventually miss out on Module 6, but figured he got quite a lot of the American history last year (however, he missed out on world history other than what we covered re: World Wars). So, I figured I could maybe have him do the extra reading solo over summers in High school so he doesn’t miss out on it entirely. Plus I was embracing advice to not worry about every child necessarily getting every history period covered perfectly prior to graduation.

BUT, now…I am on Step 3 of my “Planning your CM Education” and just discovered there are brief suggestions for ways to combine modules in less than 6 years. Being new to homeschooling and brand new to SCM, I do not know how one does that condensing. I would also feel hesitant to rush through OT Bible in the condensing of the first two modules. I was also looking forward to following a well-laid guide, unamended.

How often do people condense the 6 modules to 5 years? Would you do that in my shoes to get it all in? And if you would condense, please help me to know exactly how.

Or would you just have him catch up on his own what he would have missed last year when we only covered the American history component? (We did Truthquest:American History for Young Students 3). He enjoyed that time period, in fact, I started at “the end” for him bc he had never really had American history in the schools he was in prior to homeschooling and was begging to learn it. That being said, I have every confidence that he will retain what he read last year (living books, after all!) and could probably be coaxed to fill in the world history gap apart from schooling sometime between now and graduation.

Thank you!!

Heather