Did you make custom bed mounts to hold the larger 12x12 bed?
Yeah I had to hollow out the corners a little bit to make it fit. The parts are uploaded in the TAZ forum section somewhere. I’ll re-upload them if you want them.
I’ll hunt around for them
I went ahead and made a thingiverse page for the bed corner mounts for the Aluminum bed since I’ve needed to dig them up a couple times. http://www.thingiverse.com/thing:1098784
I haven’t worked on my Taz in a while because I went and ordered a mill from LMS to which I converted to CNC. I decided to attempt to mill out the back plate for the X axis (Acrylic as a test) as my first project and I am literally hitting the ground running on this. I have no CNC or machining experience so it took a while to convert the gcode.
I think for my first part, it came out decent and the 1/4" acrylic is pretty sturdy. I might not even need to use aluminum
On an off topic and side note, I do plan on machining the lower bracket for the “Javelin” hotend (dual extruder hexagon)
Nice work, that should be plenty strong!
Is the eccentric spacer the 6mm or 1/4" version?
I’ve been using the 6mm ones, and 6mm non eccentric’s for the top
Great. Thanks. I am ordering parts for a X and Y upgrade on my Taz 2 today. My Z has already been updated to Taz 4 specs.
I hope this brings a swift end to my battle with ripples. 
The X and Y helped quite a bit on mine, with the reinforced hexagon carrriage getting rid of the last of them. My Z mod and the anti wobble do help a bit as well, but the effect there wasn’t nearly as dramatic as it was with the X and Y. The X axis is probably slightly more of the fix than the Y is, but adding the Y mod definitly also makes a noticible difference. Let me know if you run into any issues.
Thats a great idea. I have an x-carve kit waiting for the dewalt 611 mount before assembly. One of the projects on the list is to make a aluminum bracket for a compact direct drive dual extruder.
Never thought of acrylic, but that’s should be plenty stiffer and easier to work with than aluminum.
Hmm not sure if I grabbed an old revision or something. The holes space the wheels out a bit too far.
I only thought of to test it on acrylic because I was at the Tap Plastics store buying some corrugated plastic to enclose my mill. The acrylic pieces I got were from their scrap bin for $1 a piece 
Yes, the first version is 16.5mm too tall. There is a corrected version now in the thingiverse repository and in the forum here, but the old one is still out there if you grabbed it early.
The one on thingiverse is the STL for the 3d printed part or at least from what I saw–I could just be blind! The shape is slightly different than the one used in the aluminum bracket that you have.
The dwg file has the backplate shape in it.
Hmm looks like it’s the same length. This is the one that I’m seeing:
The DXF in thingiverse is dated from July
That’s the old one. Mm. Ill re upload it tonight when I get near a real computer. There should be a copy of it in this thread somewhere though
Thanks! I skimmed through several times but I’m sure it’s there and I’m just not seeing it for whatever reason
Here is the correct metal backplate file in a couple of formats
Taz_Openbuild_X1_backplate.stp (46.1 KB)
Taz_Openbuild_X1 Backplate Metal.dwg (43.4 KB)