My Robo 3D printer has been modified so many times I am losing track of them all, so I thought I would list them here before I forget. and to let others know about modifications that can be done. I started with the R1+ with the heated bed so I could use both PLA And ABS filaments. My first upgrade was a set of Z axis stabilizer brackets from Thingiverse printed in Blue ABS filament. Next was a set of spool holder brackets designed in BobCad that mounted on the top of the printer. Robo 3D offered an upgrade to the original Y axis slide rails with smooth rods, linear bearings and a easily removable heated bed, so I ordered and installed that. I didn't want to tie up my computer while printing, so I ordered a Smart LCD controller XXL from Printed Solid and designed and printed a custom enclosure for it that mounted to the side of the printer. I now save my gcode to a 4Gb SD card, and print standalone. Robo 3D offered the auto leveling upgrade kit with new Z axis limit switches, ordered and installed, and upgraded firmware. My original plastic hot end clogged so bad that I had to replace it. Decided to order an E3D V6 kit from Printed Solid and Installed that. Nozzle clogged real bad, ordered and replaced it with new one,along with the hot end thermistor with a new screw in type from Printed Solid. Robo 3D offered an upgrade to new Z axis lead screws to reduce ribbing, ordered and installed them. The original hobbed bolt was tearing up the filament, ordered an improved replacement on ebay and installed that and replaced extruder screws, springs, with hinged standoffs to make filament changes easier. Changed spool holder to use an stainless steel adjustable arm that was salvaged from a computer mounting arm from an old wheelchair. Installed an LED light strip inside the top of the printer. Installed ferrite bead chokes on the cables to all stepper motors, heaters, power supply, and ribbon cables to the LCD, it eliminated the occasional scrambling of data on the LCD screen. Fabricated an aluminum front cover with the R1+ logo for the extruder to help with wire management on the X axis and improve it's appearance. Added 3 extra magnets to the Y axis bed supports to improve the stability of the bed. there were 2 on the front and 1 in the back, now there are 3 on both ends and the bed doesn't wobble when leveling. Found a Kickstarter campaign for FLEKS3D for an improved build plate, I backed the project and received the reward, installed the build plate system, and it works fantastic, no more hairspray, no more putty knives, no more parts warping off the bed during printing, just flex it to remove the part. available from http://www.fleks3d.com Designed and printed a filament colorizer using Sharpie chisel tip markers to experiment with coloring my filament, Installed and tested. Works well. Print quality is now very good, and no more Z axis ribbing, no warped parts lifting off the bed during prints. Using my Robo 3D printer is now much easier and much less frustrating than when I started, I have paid the price of being on the bleeding edge of new technology, I hope that new users of 3D printers can appreciate the effort and costs the community of 3D'ers have endured so they could have a better 3D printing experience than we started with. The newer models are much improved and will continue to do so because of our community efforts. If you are a new user, reach out and thank one of us " old timers" for making it easier for you, and pass what you learn to others so their experience is better as well. Thanks for reading.