Tayda does have the spline shaft A10K in stock - along with spline versions of the other pots. https://www.taydaelectronics.com/lg-10k-ohm-logarithmic-taper-potentiometer-spline-shaft-pc-mount.html I was wondering on the slide potentiometer travel distance? Didn't see them in the Tayda BOM and it didn't look like they were included in the partial kit?