I would have to agree with you Matt, there is a lot of room in the cabin. It has more room than the Kadet Jr does and the Jr's got plenty for three S48s installed on this Futaba servo tray:
https://www.towerhobbies.com/product...CABEgLNTfD_BwE
Since the S48 is a standard sized servo, that tray will work with pretty much any standard sized servo Futaba sells