The QanBa Round Restrictor Gate is a nearly perfect piece of hardware, especially when it comes to circle or quarter circle movements. Only downside is the "shoryuken" move which is slightly harder to perform but not a dealbreaker.
Fits JLF joysticks perfectly !
Pull your Sanwa stock gate back and install that Qanba round gate on your JLF joystick to perform quarter, half or even full circle without being annoyed with corners.
As far as I'm concernd, just one thing could be improved : the radius of the circle is a bit too large for me. They should make a "tiny" version with a smaller radius, about like the one of the Seimitsu round guide (for LS32).