Considering attempting this mod: Solidoodle Core XY conversion (Page 2 of 2)

Come on ward, you know you want to do this mod.  I know you've got a couple solidoodles around, you should convert one of them!

Here is the first calibration steps after setting E steps/mm.  Nailed it!  I'm very happy with this printer so far.  The only complaint is that its hard to get the extruder tension set just right without a spring, so I might be going to an air tripper extruder or mount a Titan as bowden.

It the calibration steps at .30mm layers.  It is not actually rough at all, the first photo is just showing the LED reflections.  Second photo shows the finish a little better.

This was only about 30 mm/s.  The printer can go faster but I am actually chasing an extruder issue that is limiting it right now.  The Voron flex bowden extruder that I am using either requires more torque than my 0.9 can put out, or I am having difficulty dialing in the tension arm tightness.  I'm getting some skipping at the extruder.  I'm sure I can get it dialed in and I'm looking forward to testing it at 100 mm/s.

Awesome, I'm glad to hear somebody wants to do it.  I'll put together a BOM soon but probably the only thing you might not be familiar with is the flanged bearing pulley idlers:

http://www.ebay.com/itm/141339438982?_t … EBIDX%3AIT

You will need (2) of those since the total quantity need is 16 bearings. 

Also:

There are several low profile M5 bolts and nuts that I will detail. (and washers)
Some longer GT2 belts.
You should already have the GT2 5mm bore pulleys from your solidoodle X axis. 
The Y stepper could be reused as one motor and you will need one more NEMA 17.
Pick up a 5mm and 8mm drill bit.  (the mounts are parametric in openscad.  You might get away with M3 screws.  the 8mm is for clearing out the Y rod holes in the mounts).
Assemble your choice of bowden extruders and find a plan to mount it on the back.

The carriages have actually been redesigned since I printed mine.  I'm only getting 110 mm of bed space on the X right now but I suspect I will be closer to 140 once I get those on.  The bed will have to be moved back about 30mm to get some Y axis space back.  This will be kind of a pain since I'll need an M4 tap and the drill bit that goes with it.

I want to redesign the motor mount just a little bit to relocate the Y end stop so that it does not contribute to the limited X space.  Probably only about 2 hours work, but I don't know when I'll bother to do it.  I think that's it for now.