I've had a set of X-acto knives for quite some time, it is similar to this one on Amazon. I designed this tray to be stand-alone or mounted onto pegboard. I used generic pegboard plates to superglue onto the back wall of the model, this allowed me to get the alignment right without precise measurements during the modeling process. Put superglue onto the plate, put the plate up on your pegboard, then press the model onto the plate.
Forgive my modeling skills, this was not my best work. But came out functional.
The author marked this model as their own original creation.