About this 3D model

I wanted to buy an Extruder Controller from Makerbot but they are out of stock. And have told me that they are not likely to get any back into stock soon. So I decide I will make one and find out that three of the components on the board are no longer manufactured! So I decided to redesign the makerbot's extruder board and here is a drop in replacement. It's been designed to be dual steptrude compatible as I have removed the DC motor controller (As the have stop making that chip and upgraded it to a small package version). It has upgraded Mosfets (again they stopped making the one on the MECV3.6) and have added two more in place of the dc motor controller. And Maxim-ic are stopping production of their thermocouple chip, so that also has been updated. I've added a ATXV12 connector that drives the Mosfets. Currently the connector is rated at 300watts which should allow for more power to be delivered. I've also include the option to either use the on board voltage regulator or 5v from the PSU. I've ugraded the MPU to be a 328 instead of the 168 which gives it more Ram and Flash, thus allowing more hacks to be done to it. I plan on making a PCB run from my local PCB manufacturer. If you want one then shout and I'll see what I can do. A Firmware update will be required. #Updated. I've changed the design so that it accepts the mosfet on a Daughter board. That way you can replace the Output stage with something different, or better still stack the Daughter boards to double/triple/quadrupul the power. output. #Update. PCB finally has arrived. Now I need to make it. Unfortunately one of the sockets did not have the right size holes. May have to hack it.