ASER
Has your checklist been approved by your regulator (CAA)?
If you have an issue with the RFM then you should take it up with your CAA inspector who should take it up with the factory. You are a customer and have the ability to demand answers, especially if they are routed through your National CAA.
I notice that your checklist by itself does not invite routine use of the TL - seems that you too have an ambiguity problem in that the advice in the checklist is insufficient for the pilot to make an informed decision about when and where to use it. What does your OM say on the subject?
G