What are the cooking times if I cut the legs off the turkey and do them separately?

[mamhaf]

I've just heard a chef on the radio recommending cutting off the legs and cooking them separately to the crown because it stops the breast meat drying out.

Does anyone know what the recommended times would be?

Presumably still 20 mins per lb plus 20 mins for the crown, based on the weight of the crown on its own and the legs worked out per leg? So they'd go in after the crown?

But would the legs need the extra 20 mins too? Or just 20 mins per lb each?

Thanks!

Not sure google it