Next time need to level keelson before putting in all the battens. Knew it would be a problem but ignored the thought. Little helpers set shims and wedges at each station and tuned in the offset from the baseline. Most are within <3 mm but the 8-7-6 stations again were troublesome. Unfortunately there is a bit of stress in the keelson laminate as it is clamped in the form. More tuning has slowly arrived at a good compromise. I switched the baseline to mono-filament line, aligned the laser to the form then found the keelson center-line dead on. The mono-filament was aligned with that and heights taken starting with 381 mm at transom and 851 mm at stem.
Now the height tuning has really only taken 2-3 hours. After discovering some twist that was removed a line was transferred from the batten form to the edge of the laminate. The laminate has been removed and is ready for some initial planing / sawing. No progress on transom assembly but hope to start cutting that up next week. Once the keelson is cut up a bit it goes back and re tuned to the form for a finer planing then I will let the router loose on the skin joint and see where we are,