Thanks for that pearl of wisdom Slam Click, ha ha.
I have used the Rob Avery notes to study which I have found pretty good (Although things obviously have not gone according to plan). The only problem I have with the Avery notes is that the working has not been updated to the new CASA rounding/accuracy limits so if you use the correct rounding you get an answer ballpark to what Rob got but not exactly the same (There is a section on the CASA SOP but the pracci exams and examples do not follow it). Not a big deal but it does not do a good job of testing your adherence to the SOP. Given the money you have to pay for these notes it would be nice if they were accurate.
You round BRW to the nearest 2000KG, it is a little grey the way Rob explains it (I think it might be a typo in his notes) but it is discussed on Pg 2-2, para 11 of the 727 POH.