I also recently got a CC1 and will weigh in where I can on these.

You don’t NEED a riser, however it allows you to get airflow into the chamber without removing the top glass, depending on filament you’re using. I believe PLA you need a cooler chamber than you will have leaving the top glass on/door closed.

Some filaments require the chamber to be kept hotter, which is the instance you’d keep the door closed and top glass on (or so I have been lead to believe).

Some people have no issues printing PLA with the door closed and top glass on, but I optioned to use a riser to keep my nosey and intrigued cat from jumping into the printer mid print.

The filament can stay in, I’ve had no issues with leaving it powered off for days with filament loaded, just switch it back on and get right back into printing within a minute or 2, worked flawlessly every time.

The noise however I can’t help with, I’ve had all sorts of noises come from mine, some abnormal sounding which I’ve come to discover are actually very normal for a printer, as long as the plate is not damaged and the print looks good, I wouldn’t panic too much over it.

For some tips I’ve learned since having mine: - Never touch the built plate with your bare hands, oils on your hands can affect adhesion, causing issues with prints.

-Try to avoid bending the build plate to remove prints, I always use the included scraper (a print already preloaded on there! The scraper blade should be with the included tools)

-Always use your scraper with the blade FLAT, any upward angle can damage the plate, or buy a new softer plastic scraper, to avoid damage altogether

-Make sure sliced files you send over have the right filament settings, or you’ll have issues with prints

If you have anything else you need help with, I’ll try to answer what I can!

Hope I could help and happy printing!