Decided to make my own filament guide!

Works perfect with my i3 clone (Monoprice Maker Select) and assume dimensions are the same for other i3 printers. Not totally sure.

Slides right onto the stock filament spool holder so if you are using another solution, don't bother to print.

Monoprice Maker Select (i3 Clone)

No

Yes

.2 mm

35%

18% fill supports worked best for me