: Make sure the front spring for the flip-up door is tensioned correctly so the door snaps shut.

Are you putting this together for a or a custom spool swap ?

For a visual walkthrough, you can find detailed repair guides on Legacybox or watch a spool-swapping tutorial on YouTube .

: This is the most critical step. Pull a slack length of tape and guide it through the "tape path" at the front of the cassette. It must go behind the two plastic guide posts and over the small rollers at each corner. Position the Springs and Locks :

: Flip the cassette over and replace the five standard Phillips-head screws.