The lack of the washers is worse imo. The smooth acrylic has no buffer/friction between them without the washers so you need to tighten more to prevent slipping. Not a huge deal especially since the arms are thicker on Archi compared to Yeti but worth pointing out since I never noticed it mentioned before. If you plan on printing your own, it may be an issue with the length of the bolts provided so I’d say just don’t worry about it. You’ll be fine.