Make sure Phil and Lil eat higher protein than that free feed.
Turkeys need much more protein than chickens to grow properly.
If you notice them lagging, switch them back to more grower. If you find they are doing well - all the more to you. I wouldn't personally do it, as corn is not a balanced diet, and I've heard a lot of nasty things about soybean.
I feed 60% grower to 40% scratch grains (my scratch grain is low on the corn).
Thanks for responding to this comment. I also wondered about the high corn content of the diet especially since both the corn and soybeans are probably GMO products.