Venting Strategy Suggestions for Added Bath

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Hello everyone, hope you all had a great Thanksgiving. The weekend isn't over quite yet.

I have been a lurker of this site, it's a great resource. I am sorry to hear of Terry's recent passing.

I could use some help determining the best venting strategy for an addition to my home, which will include a second bath. I am a pipefitter and very familiar with installing pipe, but I have never designed a DWV system before. I have a lot to learn about this.

In my mind:
1) the lavs will need to be vented to roof (1-1/2" vent appropriate?)
2) the toilet and shower will need to be vented to roof (2" vent appropriate?)
*would the best place to install the "vent stack" be at the toilet?

How would you all recommend that I go about this? I have read about horizontal wet venting, but I am not sure that I understand how to utilize that in a helpful way.

A snip from my floorplan is attached. Red lines show the routing I have been considering. All plumbing is in my crawlspace. Thank you for any guidance and suggestions you have!
 

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