I guess they still are making them the same old way. I purchased a 3925 about five years ago and had major problems with mine too. Hardware loose and screws were to short, out of square linear rails, 3/8" aluminum table, no where near being flat, ball screw bearings spinning in housings causing major backlash, same problem with 4th axis, weak frame causing vibration just making light cuts, servos acting like steppers where they would get lost, router was bolted to a crooked out of square, welded steel table they made for me which made the router way out of whack also. The ball screw bearing housings were not even parallel with the linear rails causing drag and excessive wear. I looked at the Chinese routers at first, but thought I would get better quality from a USA made machine.
I have spent over 150 hours and about $1000.00 straitening everything out on the mechanics and accuracy of this machine.
I pointed out these issues with them back then too, but it sounds like they did not listen and continue on making them the same old way.