Oh man, I dropped a "rare" fossil once and glued it back together so badly it looked modern. Maybe jessica_moore is onto something with those replicas.
My friend Liam worked at a small museum in Toledo. He was moving a replica T. rex tooth and dropped it on concrete. It shattered into about twenty pieces, but putting it back together forced him to learn every ridge and groove. He always said that break was the best training he ever had.
Used to think a real fossil was the only thing worth studying. Hearing about your glue job and Liam's broken tooth changed my mind. If a copy breaks, you learn by fixing it without the guilt. Sometimes a perfect fake is better for learning than a fragile real thing.