Upgrades I have done to my Shapeoko 3 XL so far after a year of ownership. Most of the upgrades have been on a tight budget but i hope to change that in the future.
Shop Fox 36” T Slot x4:
https://www.amazon.com/gp/product/B0000DD1O9/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1
INCRA Hold Down Clamp x2:
https://www.amazon.com/gp/product/B000W07PEM/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
Laptop Stand:
https://www.amazon.com/gp/product/B00CM9NG1W/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1
Work Bench:
http://www.hammerzone.com/archives/workshop/bench/below20xl.html
Laser Engraver:
http://endurancerobots.com/en/lasers/laser-35w/
4th Axis:
https://www.ebay.com/itm/CNC-Lathe-Router-Rotational-Rotary-Axis-A-axis-4th-axis-3Jaw-Chunk-Tailstock/302522183109?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
Gshield:
https://synthetos.myshopify.com/products/gshield-v5
Arduino Uno:
https://www.sparkfun.com/pages/arduino_uno_comparison?gclid=CjwKCAiAhMLSBRBJEiwAlFrsTgAWYGcOYPlz8SVD-h9CDvQU85U0_xTLWvULIJ6dJGjzoWscEuOdlRoC_CgQAvD_BwE
Keypad:
https://www.amazon.com/gp/product/B00T5J6GK0/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
