What a wonderful design! Thank you NOP21.
Ordered the spring and bearings from China first and studied the build process while I waited for delivery. I made a paper template of the 72 degree angle on the escapement anchor and used a file to cut the correct angle. I was able to use #4 wood screws for most of the assembly. Where the parts fit are great you have to work at eliminating friction anywhere you find it. Be prepared to assemble and disassemble parts until they play well together.
I used a PRUSA MK2 with a 4mm nozzle for printing.
Good luck with your build!