Printrbot gets new dual extruder in Beta http://printrbot.com/shop/beta-printrbot-dual-extruder-upgrade/ – need to upgrade mine first, I guess. Would love to print PVA support.
Really would be so much better with a 1.75 bowden setup…
Carrying those 2 huge steppers on that puny-ass frame is just asking for slow, terrible performance.
@ThantiK I was surprised, I thought it would be a Bowden also. The new v2 is pretty rigid, but still I had assumed it would be fed like you say until I saw the pictures.
What makes you say the frame is puny-ass? It seems like a fairly rigid setup. This looks like it is basically two of the Simple v2’s direct drive extruders back to back, btw.
Yeah I was more surprised because it seems to take up a lot of space. I assume you can get to both sides of the bed with both hot ends. I keep thinking about a 4X Bowden feed 
@Jasper_Janssen , what’s the fastest you’ve seen a printrbot print reliably? I’m doing 90-120mm sec, with 220mm/s travel speeds. I can do that about 120mm high. Every printrbot I’ve seen maxes out around 40-60mm/s because of the lack of rigidity bracing the top of the Z rods.
The frame is puny-ass and lacks rigidity to print in any serious speed. Don’t get me wrong, the printrbot is a great machine for people who are new, it just leaves a lot to be desired.
@ThantiK I’ve seen them toward the 80-100 mark, but of course that’s a fairly irrelevant parameter — the thing that is limited by rigidity is acceleration and jerk, not straight speed, but that is a bit harder to quantify precisely.
That said, the gantry does not sustain any back to front accelerations, so the lack of back to front bracing should not, in itself, be terribly problematic. The best way to brace this type of bot (including Mendels) isn’t with a brace going toward the back or front, but with one going off to the side. Disadvantage is that it appreciably embiggens the footprint, of course.