Add a dial gauge to your 3drag to check and improve bed leveling and Z endstop repeatability. My dial gauge is a Borletti. I uploaded also the solid model (.iges without any fillets). You can modify the part according to your dial gauge.
The part should fit with the original 3drag hotend. I designed it for my 3drag with E3D lite 6 hotend.
You need also three M4x50 mm bolts and a M3x16 mm bolt with an M3 nut.
After printing drill the two holes with a drilling machine to get the right size for the holes.
I printed it with PLA using supports.
Use a little of brim if necessary.
Then drill the big hole with a 8 mm drill and the small hole with a 3 mm drill.