It depends on how many digits of pi you want to do in the end. If you’re looking at 500 total then you’d essentially rework 50% for reasons of “consistency”. If you’re looking at 5,000 - 10,000 digits it’s only 2.5 - 5%.
Not sure how you use your major system, but let’s say you place 5 digits per location, so 50 locations for the first 250 digits (roughly the 238 you mentioned)… how long does it take you to place those 250?
If it took you 5 minutes to do so, you’d get about 500 point in speed numbers in memory competitions. The world record is more than double that in 5 minutes. Say it takes you 10-15 minutes, then why not just do it if the consistency factor bothers you. If those numbers seem completely out of reach, it’s a whole different story…
You can also have a look here for some more ideas on how to structure the learning of pi: