It looks quite adequate. To avoid any slight table saw T Slot to jig mounting errors, be sure to cut each mating corner by cutting one piece from the left side and the other piece from the right side. If your jig rails are at a true 90 deg, cutting the two pieces of the joint this way should yield a perfect 90 degree joint, even if one piece is cut slightly off at 46 degrees and the other at 44 degrees.
Charley
Charley