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Not sure we talk about the same thing.

I mean "F-RollerM.stl" It takes 4 hours 34 minutes on mine 86 grams of filament... the old "IE_Roller_F_25.stl" took 4 hours 49 minutes - 92 grams of filament.
My question was really: was/is it necessary to strengthen the lower part? It is smaller in height, but much more bulky.