I have an Iwata HP-CS Eclipse with the .35mm AND .5mm nozzle/needle setup.
You will also need to swap the headset (01 needle & 02 Nozzle cap) not just the needle 17 & nozzle 04.
Parts Diagram: https://airbrushes.com/parts_info.php?cPath=1_9_47&products_id=18
Parts 01,02, 04 & 17 are specific to the 0.35 OR 0.5 set, & 01-02 are very easy to mix up. (don't ask how I know)
I spray mostly Badger STYRENZ (sp), Vallejo AIR and Humbrol varnishes & most of the time I use the 0.5mm headset & needle.
95% of my spraying is with the 0.5 set as primers especially require a higher pressure & will suffer less from tip-dry & blockages.
If I could afford it I would have seperate airbrushes, 0.5 on the one with the bigger cup, & 0.35 for finer work.