Seems good, but all joints are too tight, i spent a lot of time with rasp. Maybe my printer not so precise, but i think enough. Threads are too small to be printed good, i not found all the same rods and inserts - i used other way - you have to use strong glue to make it usable. I am not so satisfied with my result, but instructions are good and i think if you have all needed components - you will succed.
Misterjtc, thank you for the model !
ps. the third arm i will reprint later.