The range with Cryoflamer adjusted to 500 + Ballistic Rangefinder and Storm Needler is working just fine for me, see picture of Conquest (where the weapon mounts are more or less side by side), where the ship also has ITU installed -- so Ballistic Rangefinder's 200 range bonus for medium hybrid weapons is adjusting the base range, as it should.
On the Dominator, the large ballistic mounts are in front of the medium ballistic mounts, (which the game does take into account for weapon ranges), so that might be why you're seeing a discrepancy.
[attachment deleted by admin]