As a Japanese seller of the Sanwa JLF we know how popular the joystick is. For a couple of decades now the joystick has probably been the best that is out there and the standard for Japanese arcade gaming.
If you wanted you could play with it stock but you could also change the main guide to an octagonal one and get a completely different feeling of it.
Over the years there have been numerous people/companies developing different parts for the Sanwa JLF to make it more refined; custom actuators, harder springs, round gates et.c.
While all these parts changed the feel of the JLF somewhat it never revolutionized anything but that is about to change.

"OTTO DIY Kit V2 - Korean Version", made by OTTO DIY, is a very high quality product kit that will transform the normal Sanwa JLF to a joystick that feels more like a Korean joystick like Myoungshin Fanta/Crown 303 because it uses silicone grommets instead of standard bowl pivot that the standard JLF uses.
If you are a big fan of Korean joysticks this is a product for you.
 

What's included in the V2 Kit:

• OTTO DIY Nylon JLF Joystick Body
• OTTO DIY FD Nylon Gate - Square Gate
  Standard square gate just like the one that normally sits on the Sanwa JLF, the difference however is that this in made out of one piece and not two like the one from Sanwa, this means it has a more solid construction.
• OTTO DIY BYF Nylon Gate - Circle Hybrid Gate
  This gate is a more circular gate but with distinctive corners like the square gate which means you can easily do 360 movements and find the corners.
• OTTO DIY .95# Spring
  Softer than the standard Sanwa JLF spring but with the added tension from the silicone grommets it does not matter. If you want an even tighter feel you can always use the standard Sanwa JLF spring if you wish.
• OTTO DIY Nylon Oversized Actuator Kit - 12, 12.5, and 13mm
  The kit comes with three different sized actuators which will help you find the perfect throw.
• OTTO DIY Teflon Grommet with 40 and 60 silicone inserts
  The kit comes with two different silicone grommets with two different tensions, 40 and 60.
• OTTO DIY "Gold" YFS Screws and Nuts
  Fastens the nylon body to the Sanwa mounting plate.
• Grease by Shin Etsu
  We will include some G-501 grease by Shin-Etsu so you can lube the parts correctly.

 
This kit requires you to also have these parts from Sanwa:

• JLF Mounting Plate (Product name: JLF-P-1)
• Shaft (Product name: JL-S9F)
• Dust Cover (Product name: JL-PP1)
• E-clip (Product name: JLF-E)
• ASSY PCB (Product name: TP-MA).
• Spring Receiver (Product name: JLF-P-6)

Optional parts that fit the kit:

• JLF S-Mounting Plate (Product name: JLF-P-1S)
• Standard Spring (Product name: JLF-SP)
• Optical ASSY PCB (Product name: GamerFinger Optical PCB)