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lol sorry but by college budget I meant paying rent food and classes, while going to school fulltime. If the book is as good as you all say it is worth the invest ment, from previous exprience I have bought some reference matirials that just weren't worth it.
But as i said if the book is worthing i will buy it now.
Clearly, it is possible to service your regulators without Harlow's book. His book does seem to be the best one for fledgling DIYers. There is lots of documentation and information available on the internet that you could eventually figure it out if you take your time and do the research. But Harlow's book can get you started with a solid foundation of knowledge and understanding of scuba regulators; and it will allow you to avoid costly mistakes and unnecessary expenses.