So a month after getting my big box dual am onto commissioning it. Very pleased with the overall quality and feel everything is very professionally thought out. Instructions were very clear and easy to follow. Now previously in the build I noticed half the shaft bearings were notchy to the point of being unusable. On further investigation the innards were either missing the odd ball bearing, or had a covering of what looked like rust. No amount of soaking would bring them back to life so being a perfectionist I threw them away and ordered a set of eight off ebay thinking I would pick the best four. However all turned up perfect in sealed an oiled bags. Maybe I was just unlucky that the postie from E3d dumped mine in a damp part of his van. Now I find one of the motors is seized solid. I only realised this when did the grub screw up on the pulley and nothing moved. Can't see any surface damage on the motor but I assume its a manufacturing problem of some sort. I've emailed big box to ask if I can return it, but it got me to thinking. Am I just unlucky?