Just a little back story, have been in business for 6 years. Started from my house garage and grew to a 3 bay shop 2 years ago with one full time b tech. Very diverse shop we do a lot of collision repair,mechanical repairs,and used car sales with an inventory of 30 cars right now. when i first started, being so diverse helped keep the shop busy but now i am at the point where i would really like to perfect and enlarge my auto repair side of the business. i am very tired of throwing parts at cars and i know we are weak in the "CHECK ENGINE" world but i don't know how to make the jump to correct this. I know for a fact this will help my shop become more efficient and improve my used car business as well. ideally i would like to hire a Master tech who could help train the other tech and let me step into a manger position so i could buy more cars and be more aggressive in marketing the business, maybe land a fleet account. i just feel stuck with all these decisions and can't seem to decide which turn to take. i feel very lucky to have found this site and i am very excited to see what advise people have.