Flex Coupler problems..

[SiRacer420]

As others said: Rule of thumb for X-Squared, trim about halfway through the "F" marking w/ sharp scissors or Xacto knife. Use Purell Gel for lube. I've had some frames that required no trimming at all. There's up to 1-1.5mm difference between frames from cast to cast over the years.

I'm working on a "How To" page to help people out, will start including postcards w/ shipments soon w/ link to how to install.

QR code they scan on the back of a business card would be nice.