phrasal adjectives, chains of meaning, and hyphenation

0As part of my job, I often come in contact with engineers and biologists who use the adverb 'well' in conjuction with adjectives to modify a noun. Normal stuff, I know. Here's where it gets tricky...02br
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00Constuctions such as 01i00well-drained02i00, 01i00well-hidden, 02i00and 01i00well-developed 02i00pop up in the reports I edit all the time.02br
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00The way I see it, the only time to hyphenate a group of words that modify a noun is when (a) the words together function as a single adjective (i.e., they don't modify the word individually) and (b) the words don't modify each other (ex. 01i00a somewhat reluctantly formed smile02i00; this is a chain of meaning, not a phrasal adjective).02br
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00In cases with 'well,' its clear that the word is functioning as an adverb (modifying the adjective, and thereby creating a chain of meaning), but the other editors in my work group seem to think that my assessment of this is just plain wrong.02br
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00help me out... am I just wrong here?0-