https://www.reddit.com/r/typewriters/comments/1lhemm3/olympia_sm9_1973_model_platen_and_feed_roller/

Notes for platen removal on an Olympia SM9.

https://www.reddit.com/r/typewriters/comments/1kjam1u/ribbon_material_makes_a_big_difference/

Cotton versus nylon on an Olympia SM9

Olympia Typewriter Spacers 3D printed with TPU Filament by [[Subham Kumar]]

Olympia SM3 & 9 Comparison by [[Joe Van Cleave]]