Since Trimble doesn't care, why should we worry about Antenna heights? (just being sarcastic)
The latest Trimble antenna.ini file (8.56) has the Zephyr Geodetic model 2, 57971 at 85.46mm above the antenna mounting point but IGS14 has it at 64.91mm. That's 2cm difference.
The Zephyr Geodetic model 3, 115000.10 has an APC height of (trimble) 65.19mm and (IGS14) 66.21mm. Almost a match.
The R8GNSS-SPS88x has an APC height of (trimble) 64.9mm and (IGS14) 83.67mm. That's almost 2cm difference THE OPPOSITE DIRECTION!
The R10 has an APC height of (trimble)149.1mm and (IGS14) 128.36mm. At least it matches with the Zephyr Geo Mod 2.
If someone is using a model 2 and an R8, they are just screwed if they are not adjusting the antenna heights.
James