https://www.instructables.com/member/smool/
Smool's Profile - Instructables
profileinstructables
https://www.instructables.com/Knex-ball-machine-project-SmooL-II/
Knex Ball Machine Project SmooL II - Instructables
Knex Ball Machine Project SmooL II: My best ball machine yet. So big i had to stop and wait for a delivery of pieces.
ball machineknexprojectiiinstructables