Free you T MAX! No need to chain you T MAX to a computer.
Use a SD card and print anywhere that has AC power.

Attach Panel Mounts to aluminum extrusions with 5mm bolts and tee nuts.
Attach LCD to Face Plate, and Face Plates to Mounts with #4 X 3/8" countersink wood screws.
The head of the Y Belt Idler hinge bolt might interfere with the Panel Mounts. Just cut off the head and slot the end with a Dremel cutting disc, for use with a small flat screw driver.

Inexpensive components from eBay:

4X20 LCD Display
http://www.ebay.ca/itm/150834564039?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
http://www.ebay.ca/itm/Character-LCD-Module-LCM-JHD-204-B-W-20X4-/190344295723?pt=LH_DefaultDomain_0&hash=item2c5167752b

SD Card Reader Module
http://www.ebay.ca/itm/New-SD-Card-Module-Slot-Socket-Reader-Arduino-ARM-MCU-/280758300478?pt=LH_DefaultDomain_0&hash=item415e7faf3e

Rotary Encoder Switch
http://www.ebay.ca/itm/10pcs-12mm-Rotary-Encoder-Switch-Keyswitch-NEW-/140739970480?pt=LH_DefaultDomain_0&hash=item20c4c185b0

Momentary Switch
http://www.ebay.ca/itm/2x-Red-AC-220V-Light-Round-Cap-Momentary-1NO-1NC-Push-Button-Switch-AC-250V-5A-/300760592408?pt=LH_DefaultDomain_0&hash=item4606ba7018

LCD and Control Panel Electronics Assembly Resources:
http://www.justblair.co.uk/Personal/attaching-a-lcd-display-and-rotary-encoder-to-a-ramps-controlled-reprap-printer.html
http://www.reprap.org/wiki/RAMPS_LCD
http://tommyc-reprap.blogspot.ca/2012/03/panelmax-tutorial.html