3/4 inch to 1 Inch dowel adaptor

I have tried a few Skadis Filament holders that use wooden Dowels. I like this one (found on printables) because it's very sturdy and only needs 1 Dowel, but it's sized for ¾ inch Dowels and I did not realize this until after printing it. This is a small print that allows you to use 1 inch Dowels with this holders that accept ¾ inch dowels. 

I would think this would make the larger Dowels compatible with a lot of models that make dowel rack mounts with a similar method. Other models that have dowel resting on grooves instead of going into a hole may be able to use this. Note that the end that rests in the 3/4inch groove is smaller than ¾ of an inch (21mm) and rests loosely in the ¾ inch groove. 

I printed this in PETG. The fitment is TIGHT to keep the adaptor firmly on the dowel.