Anyone that thinks there is a lot of difference between a shed 5 and manufactures is deluding them selfs. You still have to do Ads sb time limited components I. Both systems. Shed 5 is just work sheet that mention everything with out being exact That's all the difference is. A good engineer knows where what and when to look regardless of ever system. This all change though with more complex aircraft but. Then aanufactures system comes to it own. As I've said before most people in GA can't afford to own and maintain there aircraft. Cost should not be considered in maintaining your aircraft to an acceptable level. That's the sad truth.
And now with lidication less and less maintence frims are willing to let things go as in the past.