with Quintus on both points. It is a very good rendering, but it does have a few mistakes, as pointed out.

As noted, this is not a Doric style temple. Hence, what Quintus sees as metopes are out of place. the capitals are Roman composites, i.e., encorporating both Ionic volutes and the acanthus leaf motif of the Corinthian order. As such, it would follow the Ionic architrave/epistyle and frieze. It seems this reconstruction has the guttae and mutules, found only above and below the triglyphs and above the metopes on the Doric frieze, just at the top of the epistyle and above some sort of recessed panels. I can find no other example of this in any other Greek or Roman temple.

As to the tympanum, there is some ancient attestation as to what might have been there. A frieze set in the lararium in the House of Caecilius Iucundus in Pompeii, depicting the effect on the temple and forum in the earthquake of 62 AD. I show it below:

As can be seen, it appears there was a circular wreath, with ribbons at the bottom.

The peak does, however, properly show decoration with an acroterium. Statues there are more likely to be found on Etruscan style temples.

All in all, it just needs a bit of tweaking and it will be perfect.