the knex sling shot requires the following.
4dark grey connectors
1purple slot connector
2blue slot connectors
1 elastic (preferably one from a craft shop or a coat elastic.)
Step 1: Handle
then put hand connector were pics suggest.
Step 2: Elastic Housing
ill just go have a cupa tea
note how the elastic goes through the holes on the orange connectors.
Step 3: Last Part YIPPEE
just build from the pics