I have almost finished to print the Z pieces. I printing the IE version of the rigid design and found the same problem explained on the first post. The bolts head are 1mm to far inside and touching the 8mm threaded rods. I missing something? I pretty sure the prints have the correct size.
To solve this problem i planning to cut 2/3 of the head bolts, this way i will have 1 or 2mm of space between the head bolt and the threaded rod.