It appears from what I seen in the pictures that the rollers can only move forward, back, and side to side.
I am not sure that I would be happy with that...
Even with this capability, SID would be difficult unless you had the quilt top absolutely perfectly alignned on the frame.
You would also be limited on the size quilts you could make, even a lap quilt could only be about 60"+/- wide...
JMHO :D:D:D