Axle weights are fine although if your running hot on one side all the time then you probably need to increase 5 psig on the axle
All tires on an axle must have the same psig
Balancing the weight in an RV is good and then you need individual weights
The folks checking individual tires are usually wanting to optimize at the lowest inflation possible
I run a minimum of 10% safety margin avoid overheating tires
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