Really Right Stuff Says that the Fujifilm GFX100S Bottom-Plate Weak Point is Address by L-Bracket
re: Fujifilm GFX100S Sturdiness: Bottom Plate and Tripod Socket Not Exactly Sturdily Built
Good new about the GFX100S bottom plate weak point:
We also found the issue with the weak tripod socket about 3 weeks ago and designed the L-plate in such a way to mitigate the problem.
See Really Right Stuff L-Brackets and camera plates including the Really Right Stuff Fujifilm GFX100S Modular plates.