Originally posted by keilau
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The self tapping screw also created a one inch crack on the plastic gearbox. I repaired it with a small amount of CA glue and sanded it down flash again. The screw looks like a #4 screw which is just a hair smaller than the M3 machine screw. I decide to tap the holes on the gearbox for M3 machine thread. Because the #4 screw hole is smaller leaving enough material for the M3 tap. The metal gearbox is now using M3 machine screw which makes me feel much more secure.
I will use the sprocket and idler wheel unpainted for now. Should finish the other side much faster tomorrow.
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