Capricorn C803 front upper arm mounts
Capricorn have introduced this new set of front upper arm mounts for the C803. The new mounts are 1.5mm higher than the standard version. This makes it so that the lower position obtainable with the eccentric inserts is the same height as the central position on the old version, while the higher position allows for a lower roll centre than before. The new mounts also limit the caster adjustment range, and are therefore meant to be used with the new shorter arm pins.
Source: Capricorn [capricornrc.com]