20x40 v-slot delta

this is a delta style large format printer i have being drafting this week. I am waiting on parts before i can tell whether the idea will pan out. it looks neat and tidy. it Should be very stable and easy to build. I am aiming for a build volume of 350mm round by 500-600mm high the max size is not as important as the overall print quality will be as this is my 3rd 3d printer I’m hoping to improve on the models before.

I have printed 3 of the parts and so far no slicing problems.
The v-slot can be acquired from openlabs.com.au in Australia and the shipping is very reasonable.. Only downside with the v-slot is the matching wheels are $5 each so if anyone has any idea on what would be a good substitute while maintaining accuracy I would love to hear their thoughts.

i will be sure to add pics once assembly starts. thanks for viewing.