Agreed, that bedding looks fine. Good 1st job! Likely plenty strong, however cross bolts or pins won't hurt and are just as easy if not easier to install as what you just did. Easy to make and use your own jig if you have a drill press. Once you see how the jig works.... very simple, straight forward process.
Just a matter of securely attaching a fixed, exposed, short point (1/8"-1/4" of a small nail point is adequate) to your drill press table- usually in a piece of scrap plywood. Align that fixed point nail tip on jig to the larger diameter cross bolt drill bit tip, then clamp the jig to the table so they are tip to tip.
Mark and drill 4 small, shallow (no deeper than about 1/4") holes (for two cross bolts/pins)- two on each side of the stock- indicating the centers for the cross bolts/pins. The trick is to mark those exactly across from each other and at exactly the right place on the outside of the stock. Usually a tee square and some careful measuring will help. Once the four small, shallow holes are drilled in the stock, simply place one of the holes over the fixed point (the short, exposed, sharp nail tip) in the jig clamped on the table. Carefully drill the full diameter hole after using the opposing small entry point hole as a starting index point for the larger bit. Use a sharp, straight bit. Hold secure and steady with hand pressure and ease the bit through the stock until the bit's tip just touches the jig's tip. You are now within about 1/8"-1/4" of being all the way through- indexed exactly and lined up side to side as measured and marked. You can remove the stock and jig from the table and complete the drill through. Repeat for the next cross bolt hole. Go slow and steady to help prevent edge chip out. Once the drill bit tip touches the jig tip, the hole is plenty long enough to guide the bit the short remaining distance to complete the job.