J Buster CYL
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J Buster CYL is a double-sided mod by -J, measuring 21 cm and weighing 14 g.[1][2]
Construction
Parts needed
- 1 Crayola SuperTips barrel (a KT barrel is an alternative)
- 2 Giotto Turbo Color caps
- 1 Keityo or ColorTwin backplug
- 1–2 Airfit grips
- 2 Ohto Needle Point tips
- 1 Pen’zGear (for two metal rings)
Text tutorial
- Trim the rounded section from both Giotto Turbo Color caps.

Cap preparation, step 1 - Cut one Airfit grip into two sections of 2.2 cm each.
- For each cap, place a Pen’zGear metal ring inside an Airfit section, followed by an Ohto Needle Point tip.

Grip and tip assembly - Fit the completed Airfit grips onto the Turbo Color caps.
- Empty the SuperTips barrel and insert the Keityo or ColorTwin backplug.
- Double-cap the SuperTips barrel with the two prepared caps.[3][4]
Construction photographs
