Concentric ring replacement - centered mini spool

In the Kobra ACE, spools works best when centered due to the bracketed ACE lid. The universal mini spool adapter keeps the minispool to one side creating an interference between the filament and lid. Adding an additional Spacer cross (original design only calls for one) in place of the original design concentric ring fixes that issue. But removing the concentric ring means the mini spool is no longer centered axially. This adapter fits over the spindle side spool plate center to correct that. Works like a charm!