We are 99% sure that this is it. Next step is to 3D laser sinter all the parts and check how assembly work. Probably there will be some changes before production.
There are 40 parts in this picture of MessnerMoto Brake/Clutch Master cylinder assembly. We will need to use at least 3 suppliers for all the parts of the assembly. The tricky part is to keep the price acceptable. Like always this is a low volume production and the price can get out of hand even because of small bits and pieces.
To summarize next step is 3D printing.