4080 Single Sided Quad Freehand Drilling Jig Size:M6 5) 4040 Perpendicular Alignment Jig

5) 4040 Perpendicular Alignment Jig V2 70mm

6) 3030 Freehand Drilling Jig (M10)

one can only imagine the extensive time I dedicated to the planning phase

please refer to this guide:

Once you begin this project

4080 Single Sided Quad Freehand Drilling Jig Size:M6 5) 4040 Perpendicular Alignment JigAluminum Extrusion Precision Drilling Jig This Drilling Jig enables you to precisely drill 4 holes, 40mm apart, at any location of the extrusion, facilitating a 'Blind Joint.' Such joints reduce the reliance on external brackets, resulting in more aesthetically pleasing joinery without compromising on strength. The design of this jig is tailored to fit into challenging areas where other jigs may not reach. These are high quality 3D printed precision