"Crew's Mess mount is available from level 3 on up, and grants a 10% reduction for level 3. Level 4 on up gets a 5% reduction."
Note that if you're doing multiple redundant mounts, the mount screen is going to get very messy very quickly. Mounts can't be obseleted
Then again, upgrading the component (which can only be added via the mount) might work..
Phoenix-D