So is it just me or does everyone still think that adjusting gravel bike derailleurs is some sort of mystical dark art that requires years of practice and a PhD in derailleur wizardry? I mean seriously, how hard can it be to get a decent chainline and have your gears shift smoothly without sounding like a rusty gate? And yet every time I take my bike to the local shop they seem to somehow magically fix the issues that Ive been battling for weeks. So heres the million dollar question: are all bike mechanics secretly ninjas, and if not, then how do they do it? Is it really that hard to get the B-tension and limit screws just right, or is there some sort of secret trick that the pros use but wont tell the rest of us about? Lets settle this debate once and for all - is it really possible to adjust your own gravel bike derailleurs without needing a second mortgage to pay for all the expensive tools and gadgets?