Over the past two decades or so, Uni’s Jetstream has become everyone’s favourite ballpoint ink. Reviewers praise its effortless gliding, thin lines, saturated colours… So obviously I had to make an inkless version 
This mod is based on the Jetstream Prime 3&1. As the title implies, it has three pencil components: the original 0.5 mm, a 0.3 mm mechanism scavenged from the parts bin and a 0.9 mm mechanism taken from a Pentel Function multipencil (thanks to @SlideRules for telling me about this one). The fourth slot holds an eraser.
In order to appease the Uni gods I made a 4-colour ballpoint at the same time… only to put Pilot ink in the fourth slot because Uni doesn’t make a green SXR-200 refill. I’ll let you know if the appeasement worked 
