I read somewhere...

"It can be restored a hundred times but it can only be original once. There is value in leaving the bicycle in original condition. However, if you do not damage (cut off, grind, drill or modify the frame set in some irreversible fashion) the frame set, hang what ever components you want on the bicycle and enjoy the ride. But keep in mind that, someday, you just might want to put the bicycle back into original condition. Or, should you decide to sell the bike, the next guy or gal might want to put it back into "as issued" shape. Why not maintain the option?