The Raloz is set to turn into a starbase proper and bam! Dump.
When you made the "RESEARCHSUBJECT_ABILITYACCESS_IONCANNON" file originally, and you had included in it
Prerequisites
NumResearchPrerequisites 1
ResearchPrerequisite
Subject "RESEARCHSUBJECT_FRIGATEACCESS_STARBASECONSTRUCTORTECH"
How did you put these lines in there? If you copied it out and pasted from another file, what file and where is it located?
I would also reccomend that you change the maxNumLevels back to 3 and put in values for the relavent levels for range, antiMatterCost & coolDownTime in the "AbilityIonCannon" file
No, no extra mesh's are needed the Ability slot and its point are there already.
I'll have a go at making this mod to replicate the problem.