mount for Geeetech A20M E3DV6 original 

bltouch original

radial fan 50x50x15

screw for Fan : 2X 25mm m3 with m3 nuts and washer

screw for mount : 2x15mm m3 on top 

1x20mm m3 with m3 nuts and washer for right bottom (fix fan too)

1x15mm m3 with m3 nuts and washer for left bottom

screw for bltouch : 2x20mm m3 with m3 nuts and washer (with 2,5mm block file)

screw for fix hotend : 2x35mm m4 (don't force on screw - fix in plastic)

support for a20m_e3dv6_bltouch_base file necessary below bltouch part

renforce infill with modifier in slicer for the 2 parts fix hotend (gyroide 50% or more for exemple)