I upgraded my Anycubic Kobra Go with a MicroSwiss NG direct drive extruder (the Ender-3 version fits the Kobra Go perfectly), and I love it, but the filament dragging across the top bar of the printer bothered me. So I designed this simple filament guide in FreeCAD.

It mounts under the top-mounted spool holder, and you will need longer screws to replace the original M4x6. I used M4x8 and they work fine. (M4x12 are too long.)

The hole for the Bowden tube is quite snug - intentionally - and you may need to finesse the fit with a reamer or deburring tool. Just be careful you don't make it so loose the tube slides out.

I've included the FreeCAD file so you modify it to your needs.

Printed on my Kobra Go using some no-name PLA.