yeah i want to start with manis because that seems like something i can fab easily..
This is also a problem. Its easy once you've done it for a while. Welding is one thing. Accurate fitment is another.
This^^^ I know i rag on you for being dumb as shit, but you have to understand that most of us started out making our own stuff then months/years later started selling these things.
Now is it easy for me to whip up a log manifold? yes.
Could i do it as fast/accurate when i was into it a dat/month/year? NO!!!
Thats what were saying, it takes a LONG time before you can get fast enough that making a honda manifold is even remotely profitable.