Having worked as a farmer and woodcutter for most of my life i became determined to do something that would leave my mark after i was gone. Since then i got back to studies, and i have now a master degree in Electrotecnical Engineering as well as a degree on Electromechanical Engineering. On my free time i like playing and so i became interested in creating my own games or, in the shorter term, modding games to get something closer to what i would like games to be.
Since UA also uses a Whirlwind Hyperios for IDH it could likely replace the current space marines version with something like this custom made Inquisition Whirlwind Hyperios based on the FoK/PoK Inquisition rhino (just like with the razorback conversion).
Anything I should add gameplay wise?
I will likely code through OE some psybolt ammunition upgrades for the damocles command rhino, my suggestion would be for you to use it as a weapon upgrade or something upgraded through a research. Psybolt ammunition could be used as simply an excuse for a damage improvement or as a way to use a different weapon rgd with a high armour penetration against heavy infantry and monsters.
In what relates to particular additions to the current gameplay, I honestly haven't played IDH enough in UA to give useful suggestions but I will likely contact you on the subject soon.