I have been very happy with my ChainLift. But when I upgraded to Di2 105, I found that none of the pins that came with my ChainLift would work. Fernando was super patient with me as we verified that I was not confusing the directions. He determined that I would need a new pin due to Shimano's finishing process on the Di2 105. Fernando was very gracious in sending me the new pin for free. I am once again happily using my ChainLift. Thank you!
Great tool from a great company. Highly recomended for all home mechanics