Out of the box, this thing was horrible. Every turn was a lockup, the pins got stuck at halfway, and the outer clocks were very hard to grip onto. My first ever average with this clock was a 39.63, which was horrible at the time. The casing is suprisingly easy to open and it is very simple to put together. My first mod was sanding the outer gears down a bit so that they wouldn't catch on the other peices as much. Then, I made washers and custom pins using 3d printing, and applied those. Next, I loosened the casing and applied some DMN-37, and since then, I have found it comparable to the Qiyi. I have obtained a 7.24 single and a 10.63 average with this clock, would highly reccomend if you can't get the Qiyi.