New toilet install..

I am installing a new toilet in upper bath, replaced cast iron stack with ABS and was wondering.. If you look at my attached pic... will this work?

Initial slope will be 1/4" per ft. than a 45% drop to stack, total about 5ft from stack...

DO you see any problems with this??

toilet

Where's the vent?

Thats a small pic....

Vent is too the left....

Larger pic, vent to left 3" running to roof of bungalow..
Upstairs toilet waste to main vent stack



Previous mess that I fixed with new ABS stack..
Should be a shielded coupling here on the stack.