New Stack and first floor plumbing for double bath. A lot horizontal to horizontal venting I could use some help with, would like to wet vent portions of it to cut back on back venting due to limited access into and out of walls, am in the trades and know my way around plumbing but not real familiar with so much horizontal branches and tie in. Any help, suggestions and feedback would be greatly appreciated. Everything I have now is just dry fitted and subject to change, one of the constraints is head room in basement hence everything trying to be kept in joist bays, no clear run for straight stack hence the vertical to horizontal main and horizontal branches. Could get lavs and tub and shower back vented above 42 pretty easy but my Wc are almost impossible to vent without wet venting. Have some 1 1/2 that would need to be changed over to come into compliance with the wet venting but no big deal. I am under. IPC so under wet venting I believe wcs can be either down stream or up. If anybody has time to look and maybe help with my best options, guidance and advice it would be appreciated
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