Changing nozzles in Cura

[ShopGeezer 2]

Hi.  I am a new user and have Cura 4.2 running well, waiting for ver 4.4 to be released. I am printing small parts currently with a .4mm nozzle. They turn out well but in the interests of getting the most detail possible I would like to try a .2mm nozzle. I am using a .1mm line height and a 2 wall thickness in Cura.  With a .2mm nozzle would I be able to use a .05 mm line height and 4 walls? Does the nozzle size have any relation to the line height?  Can I use smaller line heights with smaller nozzle sizes or is there no relationship there?  Is a 0.5 mm line height too much to shoot for?  I wonder about the smaller nozzles plugging easier. 

 

Thanks

Don