@ChiRag_Chaudhari I know 
got mine if I rember correctly from adafruit https://www.adafruit.com/products/1184
@ChiRag_Chaudhari I did find there is 3 FabLab in Australia haha. Luckily enough, 1 of them is within 1 hour drive from my home. It is at the State Library of QLD & I check their details & I only see costs for consumable materials (e.g. acrylic or 3d printing plastic). Also a $25 cost for a safety induction. I will have to go up one day & take a look.
@Yuusuf_Sallahuddin_Y That is awesome man. Also I am looking into some other option instead of gluing pulley to the door roller. 2 Bolt bearing block looks interesting.
@ChiRag_Chaudhari 2 bolt bearing block, I had to google. But it looks very promising. Particularly the one that mounts like this
So you could in fact have your threaded shaft run from this section all the way up to the table, with the pulley anywhere you wanted on the shaft. It would be good if you can get the threaded shaft with maybe 1 inch of one end unthreaded (to slip the bearing block & pulley over & grub screw on).
Lll you need to do is file a flat on the threaded rod where you want the GT2 pully to grip the threaded rod.
Paul, to stop it from locking up you can do 1 of 2 things:
a) just pay attention to what you are doing and take your finger off the raise button before it reaches the end.
b) install limit switch that breaks the stepper circuit if the endstop is triggered.
To me, the easiest would be to just pay attention and take your finger off the button.
Where did you get the NEMA 17 for only 9 dlls?
Thank in advance!