[Joe]

Great news Gordon. Glad you're happy with the lens.

RE the foot issue...I modified (rather crude, but works) an old Ball and socket head (a jessops one that wasn't working properly anyway so scrap), and set the cut off upper thread/platform assembly in an aerosol lid to use as a mould for resin. After a bit of sanding and shaping of the resin, and a splash of black paint, I have an effective palm rest tailored to fit my own palm. The 'crinkle' paint finish created by the accident of putting cellulose laquer on blackboard oil paint adds to the grip!
Would thoroughly recommend, as it makes a massive difference to the comfort of shooting handheld, and costs little and I feel way more comfortable than the screw on sigma one