How to install flatwire buffer spring EASY with VKTR Industries G2 Heavy Duty buffer retainer

Quick tip on how to remove or install a Flat wire buffer spring easily with VKTR Industries or Leitner-Wise G2 heavy duty buffer retainer as recommended by @c3junkie . The FM Products PCC Buffer Retainer also works but is slightly thinner and not heavy duty. Here I am using a Tubb Flat Wire buffer spring in an A5 Forward Controls Design RE5F buffer tube. I also do a little comparison between the FCD vs VLTOR buffer tube.