Only if you think you are going to like the end product, and it fits. I fixed up my Dad's Paramount, though it's two sizes too big for me (it was at least one size too big for him too). And it's nice but it's not something I feel like riding very often, it only fits in the drops and tops. Grand Prix was... not a Paramount
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Genesis 49:16-17
"Well, well!" said Holmes, impatiently. "A good cyclist does not need a high road. The moor is intersected with paths and the moon is at the full."