https://www.facebook.com/InfinitySpinningWheels/
The Infinity wheel features a single drive scotch tension system. 3 ratios at 4:1, 6:1, and 8.5:1. I am hoping to be able to increase that last ratio a bit higher in future. Double treadle, comes with 3 bobbins. I typically spin pretty thin but the orifice can handle chunky yarns too. I do not have any experience with art yarns. I will measure the orifice in the morning and update that info here. I have a video of the wheel in action on my Facebook page. The wheels come unfinished ready for you to customize with your choice of stain, or for an added fee I can stain them for you. Let me know if you have any other questions and I will get back with you ASAP! ?
Edit: orifice opening on the sides is 1/2 inch Please check out my facebook page for more information, or if you have any questions, let me know.