Hi I just got my 920 and have installed it but the screws provided were too short.
If I removed the supplied washers there was enough thread to mount it. The issue was because the supplied screws had a countersunk head and when used with the supplied washers prevented the head from sinking into the larger holes in the case and fans (see pic), so you will lose quite a bit of length. Actually when pushing the screws into the supplied fans they didn't even protrude from the bottom of the fan when used with the washers.
I have got it all mounted fine now without using the washers. I followed the instructions to mount it and at the end I noticed this plastic ring that's not mentioned in the manual anywhere (in pics above). Im guessing this fits on the cpu bracket before pushing and twisting to lock the pump/cpu block on it?
Other than these little niggles I was very happy with the quality and performance of this item. The CPU mount bracket was very secure and being able to position the pump/cpu block and many different angles was a great feature that other companies seem to have dropped now. I have quite bit more over clocking headroom now
Another question: is it ok to just have the pump plugged in to the motherboard and use it without plugging the USB lead in? The pump seems to be running fine but no RPM measurement is reported and the light isnt lit up on the cpu block (Ive also got the cpu fans plugged straight into the motherboard).
Thanks
Sammy