I used a M2*8 set nut with an 8mm M2 screw to attach the lid. There is also space to insert 2mm diameter x 1mm deep magnets in the lid to help it stay clipped closed.
Print the tip holder required and place in the case. There are holders for 1000uL, 200uL and 10uL tips.
The author marked this model as their own original creation.