Finally put the ribbing/banding issue to bed (or at least improved it by an order of magnitude). For those of you playing at home, here’s what changed between the before egg (left) and after:
- Dialed-in Z stepper current
- Adjusted layer height to 0.299261666
- Lubricated both threaded and smooth z-axis rods
- Fastened z motors down (previous tshooting suggested letting them run loose)
This coupled with other upgrades produced incremental improvements until the result seen here was acheived. Thanks @Rob_Giseburt , @Thomas_Sanladerer , @ThantiK , @Dave_Durant , and @Whosa_whatsis for all the diagnosis and tips back on the original discussion thread!