I'm a 36D and I've gotten by pretty well with 3 bras and duck tape (cup bra for anti-moobage, sport for protection, tape, 2nd sport for smoothing out) and it works pretty decently under an A-shirt and a button-up. Luckily my betch tits flatten well and it's cold enough here to wear a jacket all day.

I made my own pisser by hot-cutting a hole in a soda bottle lid, cutting a big straw at about a 30ยบ angle and gluing it onto the top of the lid. I 'laminated' it with hot glue to eliminate poky bits and made a carrier for it by rolling up a rectangle of plastic (the stuff in the bottom of reusable bags) and hotgluing it into a tube. One end was capped with a circle of the same plastic, and the plug was made of another roll of hotglued plastic covered in duck tape for waterproofing. It's only for use in stalls, unfortunately; I normally only use it when I have a waterbottle on hand to rinse it off with.
As for the right angle/spot issue, my advice is simple: Get into the bathtub naked and practice! I was so excited after making my STP that I kept peein' down my leg until I realized I needed to practice in the shower first, lol.