Just wondering. If I purchase a Sig Kilo 2400 I believe it has applied ballistics in it and works with a smart phone and the Sig 2400 range finder. If I already have an old Kestral 4500 without bluetooth or any ballistic software. What would be the pro's and con's to having just one device? The newer Kestral 5700 has Applied ballistic software. Thanks in advance.