I watched the how to install video and it’s a bit more difficult than the video makes it out because once you disconnect your line from the caliper so you can feed the line through the frame the mineral oil will start dripping out after you put it back together there’s air in the line and loss of hydraulic fluid I would definitely recommend buying the hydraulic brake bleed kit to get the air out and add more fluid that’s been lost . Other than that the kit works great and it’s allowed my three year old to pull the break lever in single handed where he couldn’t with two hands using the Stacyc oem brake lever also it’s a lot closer for small hands to the handle bar overall definitely recommend the upgrade!