Help identifying P-trap replacement/sizes | Terry Love Plumbing Advice & Remodel DIY & Professional Forum

Hi all,

I've pulled the tub and replaced all the sub-floor in my bathroom tear-out, now I need to tackle the plumbing. Since I have it all open I feel silly not replacing the tub brass P-trap + drain/overflow. I'd feel a lot better replacing with new if it's not going to be a major PITA. I've attached some images to this post.

From what I can tell it's a regular 1-1/2" brass overflow and waste drain that hooks into a brass P-trap that starts at 1-1/2" slip nut joint (marked "A") to 2"(?)...

Help identifying P-trap replacement/sizes