I made this list for someone else this morning - you might want to compare all 3 designs - although I really do like Robert's quite a bit. Actually all 3 designs have different advantages. Ian has a 4th design - I think Robert stole some of Ian's ideas. Ian's latest design is secret until his talk is over at a big conference.
Geek's design for UM2 feeder:
https://www.youmagine.com/designs/extruder-um2-version-2
Robert's design is here:
Post #402. Read Robert's posts below that one for more details on assembly and such.
Ultimaker's design is in these two posts
Post #279:
post #268
I think this second post is more useful. Anyway, contact Bas for a free metal grommet.
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gr5 2,294
I found that putting the spool on the floor helps enough that I don't notice any specks of black ABS in my prints (even though they are in there somewhere).
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