Over the years of the existence of the C&T forum there have been several attempts to start a coat making topic in the BAF, and almost all have been locked or deleted, because they went against the very basic rule set by the administrator: No coat making topics!
Every now and again the admin or we moderators have tried to explain "why" this rule exists, but it appears that the majority of the home sewing/ amateur fraction doesn't really care about it and start those topics anyway.
Coat making is the most difficult discipline to master, and it cannot be done by reading books or topics on related fora. You will need personal guidance from a master coat maker. And that is the one thing no forum, not even one with a lot of professionals, can provide.
Also, it seems that many believe that a hand made draft will fit better than a store bought one. That is only true if you know what to do. Cutters and patternmakers spend years learning to make proper patterns, and it goes more into it than just drawing lines and using formulas.
It takes years of experience to see what needs to be done to the draft (or a coat at fitting stage) to make it fit a certain figure type. And again, this is nothing that can be tought via the internet, at least not in a way that is reasonable for all parties involved.
To those so eager to make their own coats and who think they can come here asking for help when things go south: Keep in mind that we professionals are on this forum in our free time. It is one thing to tell a fellow tailor to pick up the shoulder(s), reduce the chest ease and alike, knowing that he/ she is familiar with those things, and guiding a complete amateur though each step, spending hours preparing diagrams, photos and tutorials, and all that for free.
So, from now on, the "no coat making topics" rule will be upheld more thouroughly and the regarding topics in the BAF will be deleted straight away.
If any of you still desperately want to make a coat without the required knowledge and experience regarding measuring and alike, there are plenty of books available that deal with this matter.
For patterns you can either use store bought ones or those provided on the forum or buy the Rundschau books or others more easily available online, in libraries or in book stores.