Ernie Root was a bowyer whom a lot recall from his bows in the 50s-60s. The Brush Master, Game Master, Target Master, Field Master (I think)were the better known ones.
Ernie sold off his designs to Shakespeare later on and many of the Shakespeares took on this design but were slightly changed.
You can also find "Root by Shakespeare" bows around but then the Root name disappeared but the designs stayed with multiple changes in some of the risers.
Personally, I've found the early leather grip Root bows to be those that no longer get the respect they deserve but Im an old bow freak anyway.
A quick search in google for "Ernie Root" complete with the " " around his name will pop up several discussions on his bows and the bows themselves.
Sorry, Ive no info on the Kadet model itself.
God Bless