SX internal ratio changers

[AmiSMB]

As far as the manual goes I thing you will find that the overall ratios are as follows:-

34/22 = 2.78
33/23 (std) = 2.58
32/24 = 2.4

In Si Moss setup sheets it talks of a 36t idler but I cannot see that in the parts list and am unsure of the size of the other gear that would go with it.