Hi there,
I managed to get my 3510 to work for Catalina. My work was based on blazinsmokey's and KNNSpeed's guide.
https://www.insanelymac.com/forum/topic/336203-xps-9560-mojave-guide/
Most features work. My DW1560 WIFI works fine.
But HDMI/VGA video doesn't work. I've tried everything in the framebuffer patching guide but still no good:
https://www.insanelymac.com/forum/topic/334899-intel-framebuffer-patching-using-whatevergreen/
I tried forcedly enabling HDMI output. Then the HDMI worked. But the internal LVDS was black.
USB-C/Thunderbolt doesn't work.
Precision3510.Catalina.CLOVER.zip