Beatiful peace of hardware. Light enough, but ther's a lack of stability just a bit, as you can imagine. I can't find any difference between the operation of the 6000 compared to the 9000 hi hat. The only difference is the tension - probably dw use more compresed coil in the 9000, than in the 6000, which makes the 6000 way lighter in feel. Actually the lightes setting on the 9000 hi hat is as tight as the tightest of the 6000. I play with the hats a lot, so I keep circa 1-1.5" distance between both cymbals, therefore I always set my hi hat's at their most light setting - fo example Pearl Eliminator hi hat's most light setting is way tight for me. So for those who use tighter setting on the 9000 machine, 6000 will feel to light and probably unusable. Keep in mind that my top cymbal weighs around 900 grams, which is less than most top cymbals. And even that I tight the 6000 to it's max, and the distance between both cymbals is significant, as I saight around 1.5". And for those who like that retro base look, 6000 hi hat is the one to go. Not for double pedal players.
Edit: Since I got the box with missing 15" rod (dw offers the hi hat with two rods - 15 and 21") a month ago, I still wait for the dw customer service to resolve the issue. I'll update in case of possitive resolution.
15.9.21I got the missing part today. Unfortunately it's not what it has to be - I got 20" instead of 15'', but the big problem is that it's not dw - the thread is M6 x 1mm (Yamaha standart), instead of the regular M7 x 1mm standart dw thread. I'll cut the rod and do the right thread myself.
So in case of missing part I recomend to send the whole package back and wait for a new one.