Packaging was excellent. No chance of any damage to the contents. This is a very complete kit. You're not going to want for much of anything.I noticed that couplings (10mm X .250" checked with a micrometer) for the ball screws are included, wasn't expecting those. The rails are very big, 20mm, which is slightly larger than 3/4". All the rails, ball screws, bearings etc. are high quality. This kit took about a week to get, but don't sweat it, it's well worth the wait. This is a great kit, great value, and I would say Happybuy has their act together. I was highly impressed.
Ronald N. 
