So far my favorite ABS is PA-746, even though it smells like cancer.

As far as your comparison to commercial filament - I've had similar experiences. Its hard to say why on an individual case, but as a whole the industry is known for tossing in regrind of varying qualities. Industrial extrusion lines typically run hotter than a Filastruder, but have less residency time in the barrel. I'm not sure how those would offset each other, and if the increased temperature contributes to more breakdowns of the polymer chain.

PA747 which you used is a fairly common material for ABS filament, for example:

https://www.amazon.com/3DMakerWorld-Pla … B00IDCGPVA

I believe Makerbot used PA747 at one point, and I've seen confirmed a couple places that Stratasys used MG94 for their ABS filament.

Anyway, thanks again for taking the time to do this writeup. The store credit does count towards Filawinders, or anything in the store for that matter.

Then my Filastruder comes.  ABS is the easiest to do, so I figure I'll start with that.  My first ABS plastic is PA-747.  I go to use the filament, and it doesn't need a raft.  I went to a brim instead.  Then, I started to find the brim wasn't even necessary.  It doesn't warp,  it doesn't shrink as much when cooling, it's the opposite of brittle (you would have to stand there moving it back and forth many times to break a section of filament off), and parts just feel stronger in my hand.  I thought - maybe my Verbatim ABS had gotten moisture in it since opening the package.  I thought maybe it's warmer outside now - and that's why it doesn't warp like all the other brands of ABS I've always bought before.  Well, I just opened a new package of Verbatim that I already had (I don't know if it was intended or not, but Jet once had it at $17 for a 2 pack of Verbatim ABS), and come back to find an enormous mess.  The print completely broke free of the bed. 

Why does the Filastruder filament I produce (every type so far) perform better than every type of ABS I had bought before getting the Filastruder?  Is it just luck in what ABS resins I've been buying?  Is it something they do to mass produce large quantities of filament that makes the Filastruder's more individually paced production produce better ABS filament?

On a side note - I'd actually looked at a Filastruder about a year to a year and a half ago, and I ordered some filament from Filabot (Filastruder doesn't sell it's own filament).  I figured, they make a home extrusion machine, if anybody would know how to produce the best filament from it, it would be the maker of one of the machines right?  It was easily the worst ABS I've ever seen - jammed constantly, and if you put it in acetone parts of it would dissolve completely while leaving chunks of I don't know what that would never dissolve.  I thought - well, home extrusion must not be able to produce good filament.  Fast forward 1-1.5 years and I decided to give Filastruder a try.  WOW - what a surprise it was that my Filastruder is producing better ABS filament than any I'd bought. 

You never expect to both save money AND have a better end result.  The machine was even pretty easy to put together, and ABS is pretty easy to extrude.  Now to just do that review program in the DIY section, save up some store credit, and get a Filawinder (hopefully store credit is good for that even though it's Ian Johnson's thing and just distributed at Filastruder.com)