Hi guys. I am soon to be joining "Club Serpent". Got a great deal on a used 811 BE 2.0 and it should be arriving any day. I am just curious about pinions. I looked at number of setups sheets on the Serpent site and it seems that most of them used the 16T pinion. No doubt those guy are all experts so I am thinking it might be somewhat fast for a beginner like me.

So my questions are:
1. Are other pinions available like maybe at 15T?
2. Are they generic or do I need a Serpent specific part?
3. If they are generic, can you suggest a particular manufacturer and source?
4. If the original kit had an included pinion, how many teeth?