Most of the stats seem a bit high, now that I've looked. 12 pound long guns are probably too large for a vessel like that. I'll have to check the game files to find the proper relative sailing qualities.
The stats I provided with the model are for stock COAS and there's nothing lighter than 12lbs guns. As for more realistic stats, I think this xebec should be armed with 6-pounders. It's a pity that we can't place different guns on our ships in COAS, because this particular one could carry much larger guns as bow chasers (maybe even 24-pounders) and slightly larger ones as stern chasers. And it is also annoying that one vessel can be armed with cannons and culevrines of the same caliber, for example 12-pdr cannons and 12-pdr culevrines.