Wilier downtube cover/plate
thingiverse
(fyi Thingiverse I guess resizes vertical pictures so the installed pic is stretched. oops...) Because Wilier is a money hungry company, now you can shove this in their face and save $60 Printed best with a raft because it increases bed contact. Brims might help, but for small parts with little bed contact rafts work best. It's a thin cover so supports snap off clean. Do not over tighten the part and print it solid.
Download Model from thingiverse
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