What COTS parts would you like to see?

[Chak]

Originally Posted by roboruler

7075-T6 is the best alloy for aluminium gears available.
Yes, perhaps small gears such as those gears up to maybe 24 tooth could have the option of being replaced with drop in 4140 gears.

Every broken gear picture on CD has the teeth sheered off. I've never seen the body of a gear crack. So, the failure mode seems to be the teeth. Would 4140 steel gears with lightening holes be an option? How much more would it cost?