Chris Balson and Henry Gonsalves were advocates for doing this, by getting say 10 old rings, pairing up early to mid november, training them when 3 months old, which would be early march time, train them really hard, and then compete with them against peoples old birds, they found the young birds where even beating there old birds middle april. Always been tempted to experiment with it, however never found the time, but might be ideal for you.