I have LRP TC and Trinity Duo 10.5 BL
In XRAY I have had FDR = 5.49 for this motor.
In E4RS i have 64P with 110T
Could I use this FDR for E4RS?
If I right understand I could use 41,42,43 pinion, but they big (I think).
Can you recommend me spur and pinion?

What FDR do you use for 10.5 BL?