Robust AMS Riser - printable without support

Describtion:There are a lot of AMS risers on makerworld and I looked at all of them. Most of them have the same issue: They are large, beefy and need supports to be printed - that means lots of filament are necessary. I wanted a riser, that uses less than one spool of filament, is very robust, lets me open the top cover so that it stays open for ventilation, has a sufficent opening at the top to work on the printhead and of course has enough room for the AMS.So I designed my own AMS riser. It is