Rodgers, just so you have a better idea of why some guitarists really dislike adjustable saddle bridges on acoustic guitars, I thought I'd put a few photos from Frank Ford's Frets.com website into this post.
Here's a Gibson Hummingbird's adjustable saddle bridge:
Gibson adjustable saddle bridge
Here's the same bridge disassembled to show all the metal parts it uses:
Yikes!!
Here's the adjustable saddle bridge assembly on a scale:
Weight = 65 grams
Compare that to the weight of the conventional replacement bridge that Frank then put on the guitar:
Weight = 23.3 grams
So there's a weight difference of 41.7 grams on those. I don't know precisely how much additional weight the Harmony's adjustable bridge saddle mechanism adds to the top of your guitar, but it's safe to assume that it's similar.
Here's the link to that page at Frank Ford's website:
http://www.frets.com/FretsPages/Luth.../hbirdbr1.html
Hope that makes sense.
whm