You are going to make them yourself?!

Those will not work for a whole raft of reasons,

- The profile isn't correct on the teeth
- Unless using a mill and a lot of time, you will not get the required accuracy
- If you don't get the central hole bang on center they will not work
- The teeth will chew each other to bits
- 9.9mm teeth on a featherweight gear are not required
- They will be too heavy

I could go on

Save yourself some time and money, don't bother trying to think outside the box or be fancy or anything. Your first featherweight is gonna suck. It's a fact of life. Anyone that has been in the hobby for a couple years will testify that their first robots were rubbish. It's a learning curve. Save yourself money and heartache and stick to the standard stuff that people have advised in this thread and elsewhere.

Build a simple rammer, nothing wrong with that for a first bot. Take it to an event and see how trashed it gets. Then take it home and learn from it.

I should also add, that I can tell that you are enthusiastic. That's a good thing. It's a great thing for this hobby because you are going to need it when it's the night before an event and nothing wants to work and you are tearing your hair out (we've all been there). But you need to stop and listen to the advice given to you and ideally follow it.

Ask yourself why multiple people are suggesting that you do the same thing?