For my birthday, I wanted a apex groupset put on my bike. When I was quoted prices between $750-$800 installed, I decided it was time to learn to do the work myself. I recieved some tools and parts instead, and this morning successfully took off the old RD, removed the chain, and switched out a cassettee for the first time. I know what your thinking, but I am not that good at fixing stuff, so wish me luck when the rest comes in. I am not changing out the crank, need a little practice before I mess with a BB and crank.