F1r3Fly G3
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The F1r3Fly G3 is a single sided mod that is noteworthy for its difficult construction and unique aesthetic appeal. Due to needing to sand the front of the mod, it is very fragile and prone to breaking if dropped. For this reason it's usually made as a demonstration of modding ability and not as a mod to spin.
Construction
List from the UPSB V5 wiki archive.[1]
Parts needed
- x1 Pilot G3 (Everything except Grip and Backplug)
- x1 Pilot G2 (Body)
- x1 Faber Castell Grip Matic (Tip)
- x1 Pentel Hybrid Gel Grip (Tip and Grip)
- x1 Pilot Dr. Grip (Grip)
- x1 Sailor Gel (Grip) or any pen with an opaque grip
Insert Dimensions
- G2: 5.6cm x 2.8cm
- G3: 8.4cm x 2.5cm
- Cap: 3.7cm x 3.8cm
Text tutorial
- Unscrew the barrel of the G2 from the grip portion and cut it 5.6cm from the front.

- Remove the cap, tip, grip, and backplug from the G3, and add your desired insert.
- Cut off the front of the G3 from the rimmed portion. Evenly sand down the front until you can securely attach the G2 barrel from the back with an insert.

- Clear the G3 inktube of ink and cut 7.4cm from the tip.

- Unscrew the tip from the Grip Matic and remove the lead mechanism inside the tip. Glue the tip onto the G3 inktube.

- Remove the grips from the Dr. Grip and the Sailor Gel.
Video tutorial
Video tutorial by Oleg.