If you want to draw weatherboard board by board there is a quick way. Go to https://3dlibrary.rubysketch.com/entries/weathertex-ecogroove-150-natural-woodsman
I am pretty sure all products are dynamic components, use the scale tool and the board replicates and stretches.
As far as adding beading or quad. I use the fascia measure. For eaves I created my own material with lines on it i basically drew a 2400x2400 rectangle the screen shot it and added it as my material and called it 2400x600. Yet the fastest way is to simply use the fascia measure and divide by the sheet length you require to suit the overhang you have specified. The best tip I can give is to export the BIM BOQ to Excel or google sheets and then create a customer sheet where you do these calculations. I basically export to Excel, create a sheet called eaves and then I reference sheet 2 cell A1 to Fascia sheet b4. If you spend and hour or so setting up your excel sheet you will always have the individual items that you require in the format that makes sense to you.
I am glad that PlusSPec does not have all of this extra stuff in it as it will slow it down. I can get an estimate done using my method in less than 20 minutes on a single story & 30 minutes on a 2 storey.
Also for eave sprockets I use the joist tool. I select the eave faces and then use 70x35 with perimeter beam, yet I do get a few extra lengths but I fund that the carpenters use these for blocking, trimming and bath framing. I'd rather have 3 lengths over than 3 lengths short, most of the time I bang on the amount when doing this. I never have more than 2 lengths of lumber left over. I really do not care about the direction or if the sprocket lines up with the truss because I am estimating not designing.