My pleasure. Looks pretty good, but if you remove the 45 after the 90 you'll give yourself more space to hook in the tee wye needed to connect the new P trap to the drain line. Then the old tee wye gets replaced by the coupler, thus removing the old tub drain, and voila you're in business (after you replace the concrete, tiles, install the tub, clean up the mess you made, etc...
A couple of pointers about gluing PVC/ABS together;
- Measure the depth of the hub (3/4" for 2" I believe?) and mark it on all the pipes you'll be fitting together. It gives you to a target to aim for. Shapies work great.
- You really do need to twist the pipe a 1/4 turn into the fitting to get the best depth/adhesion of the joint. And hold for 30 sec. That may seem excessive but the glue does try to push the pipe back out of the fitting for the first 10-15 sec.
- 1/4" per foot is the recommended grade, and even though this is a pretty small portion of the whole drain line/run, you might as well do it right while it's exposed. I'm sure you don't want to have to do this over again. Get a torpedo level, they're perfect for this sort of job.
- The last connection in the drain line will be the hardest so you should use a shielded no hub coupling.
It'll allow you to slide it fully over the pipe, position your other end, slide it back over and then tighten it up. A 5/16 nut driver or ratchet is the right size for this.
You're doing well so far grasshopper.