Newbie Here
I built one a number of years ago, the castings were superb and it came with all the bar materials and even the wood for the cleading.
The specified threads are metric so you better buy a tap and die set from 1.6mm and up.
I purchase my fasteners from a marine company, non of the normal suppliers stocked metric to such a small size.
Chronos used to sell a nice set.
Enjoy yourself.