MTX3-B,
When you use the 3Racing speed gear set, you have to use other pinions to get the mesh, otherwise it doesn't work. Pinion size for 33T spur is 20, 22 or 24 and for 35T spur is 18, 20 or 22. These pinions are fitted in place as per the existing 16, 18, 20 T holes. You need to ensure they are Tamiya av pitch. The instructions tell you which to fit at the bottom of the page. You do not need to use the secondary gear, just change the spur, if you want to experiment.
This will alter the FDR to as low as 4.24 or there abouts, when using the 33/24 combination. You can get a similar result by using the Tobee craft speed gears.
You will know if someone has this gear set fitted, they will be way faster than you.
Apologies for bursting your bubble and your XL sheet data, but nice work anyway.
Regards,
Calvin.
Last edited by caltek1; 10-14-2009 at 11:43 PM.
Reason: spelling