1:10 or 1:12 scale project wanted...

[RC-Monster Mike]

I spent a few hours last night working on a delrin spur for this little gem. I got the file worked out perfectly and proceeded to cut 5 spurs(40 tooth delrin). I was using a molded spur gear and machining both sides to replace the stock spur directly. After the first operation, all the spurs seemed fine. The second operation, however, revealed the flaw of a molded spur gear....air pockets from the molding process. Not a single usable spur after hours of work(though the file and cutting program are perfect, the air bubbles are all in the middle-right where I need the strength)). I will spend the early part of this week sourcing a suitable spur(hopefully) so I can complete the conversion. I did modify a kyosho spur to work as well. It will require an 8x14 bearing(which I happen to have) - not a big deal, as I can make this into the motor mount, but I prefer a custom spur rather than modifying the Kyosho and requiring a special bearing). I ended up with around 6.5mm toothwidth vs 5mm on the Kyosho - the Kyosho spurs also rubbed the diff mount a little. The Kyosho gears themselves are pretty cheap, though.

Any thoughts on plan B(modifying Kyosho spur and including the bearing into the motor mount)?