I printed a model and it came out with some blobs and what one site calls zits. My piece looked identical to the photo here - https://www.simplify3d.com/support/print-quality-troubleshooting/#blobs-and-zits

A quick trip through Sketchup and I created a small barrel to print to see if I could troubleshoot the trouble. Wouldn't you know it... the barrel prints just fine! Meh... maybe someone else can use this to test their print settings....

For dimensional tests, the barrel should measure 13mm tall, 10mm around with 10.5mm diameter rings