I'm using 02 layer height in Simplify3d
4 top layers
3 bottom layers
Infill is 35%
The 6mm hole for the carbon rod fits nicely now but the square holes for the square carbon fibre rod are still a little too tight and I've enlarged them in software. I hope that tomorrows test print will be the last one of these body pieces as I'd like to move onto the middle section and the head section.