Here are some links to things that where discussed:
BangGood has some cheap 2020 T-Slot lengths for sale:
https://www.banggood.com/500mm-Length-2020-T-Slot-Aluminum-Profiles-Extrusion-Frame-For-CNC-p-1212000.html
They also have some cheap-ish screw shafts and supports:
https://www.banggood.com/15pcs-300mm-Optical-Axis-Guide-Bearing-Housings-Aluminum-Rail-Shaft-Support-Screws-Set-CNC-Parts-p-1136851.html
There is quite a range to check out: There should be some anti-backlash screw houses around as well:
https://www.banggood.com/search/x-rail-slide.html?fuzzy=1
Less than A$7.00, including shipping for a nifty component tester:
https://www.aliexpress.com/item/Mega328-M328-LCR-T4-12846-LCD-Digital-Transistor-Tester-Meter-Backlight-Diode-Triode-Capacitance-ESR-Meter/32791938198.html
Voltage Reference board:
https://www.aliexpress.com/item/AD584-High-Precision-Voltage-Reference-Module-4-Channel-AD584J-K-L-Voltage-Source-Programmable-Module-Board/32634641587.html
Now, on with some project photos...
Stacy has created a range of pop-up cards - just in time for xmas:
Rob is working on a Laser scanner/Laser engraver. Below is the Laser engraver section - behind is the beginnings of a Load Tester project:
A handy Arduino compatible LED display:
Matthew was building a new walking robot:
Diane has designed and constructed a new jacket:
Component Tester (link above) - note how it's figured out the MOSFET pin arrangements:
The LED driver board prototypes have grown. Here they are arranged from Ver 1.0 to 2.4:
Some experiments with high speed data line voltage translators:
Current version of the LED Driver board in colourful action: