<p>Does anyone know of a hot end that is sealed? What I meaning is that the hot end has a rubber seal where the filament enters to keep the top airtight (in order to eliminate oozing).</p>
<p>I am looking to build a dual extruder printer but, I do not want any oozing from the hot end which is not in use. I could build a system to retract and 'close' the nozzle but it would be much more elegant if it would work to just seal the top of the hot end. Thus achieving the same effect as when you pull up water with a straw by covering the top with your finger.</p>

You could reduce the
```
Support Density
```
:
A higher value results in better overhangs, but the supports are harder to remove.
Furthermore read
this answer
on question: "
Difficult to remove support material
".