Kossel Mini 4 Wheel Carriage

After I built my Kossel mini with 1515 extrusions I felt the recirculating ball carriages were too tight and I wanted to build new carriages with stuff I have or could get locally. I like having 4 wheels instead of the usual 3 wheel designs. The 4 wheel design was also dictated a little by the smaller Prime Line wheels I found at Home Depot. I don't think there's any more wiggle in the carriage then there was with the recirculating carriages which was very rigid and stable (possibly because it w