True Geller mod is created by BloorA. Due to many newbies do not understand well the original tutorial by BloorA, I redo it into a video tutorial, hopefully it illustrates the making better and helps answer most of the frequently asked questions.
Stats
Length: 19.7~21.5cm (adjustable if add tape)
Weight: Depends on the tips you use
COG: COG=COP (without inktube)
Writing-Mechanism: Gel or ballpoint
Estimated cost: +/-RM22
I decided to mod my Pen'z Gear because it's getting old and the metal weight rings have gotten rust. I used spare parts to mod this so it's a lot cheaper. Furthermore, my Pen'z Gear was a gift from relative. =D
Creator: cyshing
Difficulty: ★★
STATS
Length: 20.2cm Weight: n/a
COG: 0.3cm to cap
Writing Mechanism: Ballpoint | Non-retractable
Estimated Cost: RM40~70 (I heard Pen'z Gear cost about 500Yen+ in Japan or 1000Yen online but how much you paid to get it is another story)
*Measurements and estimated cost are not necessarily exact, may vary based on individual action and source of materials.