When the forks are raised above the free lift phase & 10' is well above that by 6', you also have the weight of the intermediate & inner mast channesl on the the hydraulics in addition, to the carriage forks & free lift cylinder & a side shift, more than likely - that is not neglible. One thing about hydralulic and water leakage - they happen when you least expect them.
Gravity is awesome, it kept me from being 6' tall.
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