So, when looking through the community, I see a couple of posts regarding this question. However, with mixed responses.

I have an existing battery bank with 3 sets of 2 (48v) with the BAT524120410 (old revision).

I want to expand this to the maximum allowed by the BMS (5 sets in parallel). The new revision seems to be the one that's the best available for purchase (also it's lighter). Can I expand my existing 3 sets of 2, by adding another 2 sets of 2 of the new revision?

The conflicted answers came from

https://community.victronenergy.com/questions/102358/mixing-different-revisions-of-the-24v200ah-smart-b.html

Where someone (non-expert) mentioned, a sales rep told them it's fine.

Here, an "expert answer" said it's probably not possible.

https://community.victronenergy.com/questions/120459/can-you-use-smart-lithium-200-and-200a-in-parallel.html

Before I buy these (unfortunately overpriced) batteries, I'd like to know for sure I'm not going to run into issues.

Additionally, from my understanding the limit of maximum 5 sets of batteries is caused by the BMS cable signal strength, is there anyway to create a bigger battery bank? Does the Cerbo GX support multiple Smart BMS so I can multiple banks?