update - just wanted to share this:
went and bought a kensington lock called 'combination ultra laptop lock' for 50bucks 🙁...
but quite happy with it, slim, v good quality, tough ass cable... and most importantly, no hook permanently sticking out, no allen key to lose.
combination lock working smooth, all cool, must be a new version.
can totally recommend this, and feel much more at ease now as some 😡**** trying to screw me will now have to take the bloody table, too 😎 ha