I liked the Estes EPM-010 enough that I decided to build an upscale of it.  Deciding that the -010 could be reference to the nearly 1" diameter main tube, the upscale to a BT-60 main tube becomes the EPM-016.  Main fins are 1/8" ply, tabbed through to the 24mm mount.  The fore fins are balsa, as is the nose cone and transition.