Yes, all off the lathe. This one I did pop back on the lathe, but just to draw a single radial pencil line as an index line.
With this style of Basket Illusion, where all the "stitches" or "cells" are the same size, burning the lines has to be freehand. The density of stitches is the same for the smallest ring all the way out to the rim. All are around 36-38 lines per inch on this form.
A woven basket uses the same width material throughout, and to imitate that, the density of burn lines needs to stay the same.
In contrast, the type of BI that uses burned radial lines, the cell size changes with the diameter, but the number of cells remains constant for each bead/ring.
The only way to accurately lay out detailed designs is to measure, burn and color the elements off index lines and then come back and fill in the burn lines.
I have been using such a high line/burn/stitch count as that is the only way to get finely detailed designs. It also allows the fine points on the "claws". Imagine what the design I used would look like if the density was only 16 lines per inch vs the 36-38/ inch I used.
Actually, you don't have to imagine it, tonight, I'll draw a design to simulate the look using 8, 16 and 32 lines per inch and show the difference.