[CURA Setting for Flashforge 3D Printer]

This is a good source to follow to get your finder running with Cura: https://labs.tomasino.org/flashforge-finder-with-cura/

[CURA Setting for Flashforge 3D Printer]

This is possible, I have created the start and end g-code for a flash forge finder and have used it to print parts.  You essentially open up a .gx file created by flashprint and copy the end and start gcode out and you are ready to go.

[Only supports on layer one with 0.3 mm layer height]

In Cura 2.4.0 with the following settings I get only support on Z layer 1:

0.3 mm layer height

Support Enabled,

Build Plate Adhesion Type: None,

Layer one only prints supports, no part paths are generated. Layer two has part paths and support paths. This leads to a 3D print that does not stick well to the build plate due to layer 1 not having part data.  Seems like a rounding error or oversight for thicker layer height printing, sine these same settings work in Cura 15.04.

See the attached image from Cura 2.4.0, Layers View Mode, showing layer 1 with only support paths.