I looked at the spec sheet and it seems that just taping the cells together like that should provide necessary support for all but the outer sides.
A clamp wouldn’t hurt, but probably give me negligible benefits in the projected lifetime of this pack. I’m not using this very often so the pack will age out before charge wear will be an issue. Say I get 300 charge cycles over 10 years, that would be heavy use for my radio pack.
Yes, it is quite heavy. Not for light trekking.
Yes a 32Ah 4s lifepo4. Fantastic battery. I can run full power for hours