Place fighter/bomber model in mesh folder
Make a copy of an existing fighter or bomber entity
Connect mesh to fighter or bomber entity - add custom strings and icons
Make a copy of an existing squadfighter or squadbomber entity - connect fighter/bomber entity
Add all new entities to manifest, change count
Choose which frigate, capital, structure or SB that get the new squad attached
There does not seem to be an upgrade mesh available for strikecraft so stuck with add new types. Can have as many types as you want but only the amount for dock 5? I put suicide fighter bombers at homeworld defence only, supper heavy bombers on carrier capital and SB and so on.
A particle effect is doable with an ability but will not always show if particles hit the limit late game. They are attached to a meshpoint like Above Aura or Centre have lots of particles attached or the blinking lights are particles attached to the meshpoint "Flairs".
A few good modellers have done and you have to wait for 1 of them for details. PM Thoumsin if nobody pops in.