Well... It's probably the best advice you can have, and I (used) to design for a living, I just do it for fun now; what about you?
ALWAYS go to the manufacturer because many manufacturers have to produce variants to get around patents or to give their product an edge.
What you are really asking, and why you are poopooing the youtube video, it to have the design handed to you on a platter!
The manufacturer will provide you with ALL the information that you need.
Admin, can you please bump up my post rate, it's too low for some people. TY