Should you think about fixing it, may I suggest to split the 4 Multi-Meltas into two (2) Multi-Meltas with increased accuracy, as the vehicles has one free weapon slot. Since the Achilles carries those armaments as 2 sponson-mounted Twin-linked Multi-Meltas. (In case if you see a picture and get confused, a single Multi-melta is already a doubled barreled weapon, so despite the 4 barrels, it's still just two Multi-meltas on each vehicle side.)
I don't know if you take this into account, but if cost not only represent unit stats but also rarity the Achilles should be a bit more expensive.

About the Land Raider Crusader and his 12 Hurricane-pattern Bolters. May I suggest to rename the weapon to 2 Hurricane Bolters?
Since a Hurricane Bolter by design already combines six co-axial Bolters in a single weapon mount, it sounds wrong to write 12 hurricane-pattern Bolters. (The vehicle btw carries like the Achilles those two Hurricane Bolters as sponson-mounts. This way the shorter text also fits better into designated the text box.

