Summary

I kinda liked the Avenger class made by
rostchup228 over at Cults3d
https://cults3d.com/en/3d-model/various/star_trek_avenger_class-rostchup228

But I was never a fan of the nacelles nor the Impulse drives on the struts.
They were messy and busy and did not feel to match the Starfleet-look.
Especially the starwars wings.. it just didn't look right to me.
I modified the Struts, removed the Impulse engines (the bit behind the bridge will be my new Impulse unit, just like on the Galaxy and Nova Class) and added reworked nacelles from a Sovereign Class to the sleek hull and was content with the looks

This all resulted in the Ultron class, just like the avenger but better in every way (here I am mixing 3 franchises for one pun!)

She is 335 meters long based on her 19 decks. (3.5 meters per deck)
and a nice edition to a more modern fleet with the escape pods matching the Sovereign Class ship.

As are all my vessels, this ship is scaled at 1:2000 scale,

Also available in easy to print 2 part file.

For this model to work and save resin, I made her hollow and reworked the struts and nacelles.

I printed it on my Anycubic Mono without issue and it is made for that format.