Horatio Hornblower wrote:

SNIP,SNIP
My only concern is that if I glue it up, it won't be adjustable, and I
figure there's no way I'm going to know exactly if it will fit, so I
can't glue it at least until I'm sure it all fits. Maybe then I'll try
gluing it all together, or maybe I'll use duct tape for at least one of
the joints. I figure I can figure out how to make it leak free. I'm
pretty sure I'll be able to disassemble it all and remove the sink and
the trap if and when I want to even if I glue it all up (the room needs
paint bad, and I'm going to need to get the washer and sink out of
there). I will be able to get it all out because I'll get one of the 2
inch traps that have a nut in the middle (like the one I have now).

Pick up a 2" "No-Hub" coupling. Cut the 2" ABS somewhere and put the
coupling in; that will let you disconnect at a later time and will
also give you a little freedom in aligning things.

Jim