If you're really Type A,
I think Triangulations is your best bet. Yes, it's a little extra work, removing the paper. But for a whole page of triangles, you sew one seam on the lines, pivoting at the corners. You then press the stack on both sides to set the seams and cut on the cutting lines. Press each square open and the paper helps stabilize that darn bias seam to avoid the distortion there. If you press carefully, you will have perfect squares.
Every square is alike, every seam lines up perfectly in its corner where it belongs. Type A Heaven!
There are pages similar to Triangulations that you can download from the internet to try out the theory. Here's one page with a variety of sizes:
http://www.quiltingandwhatnot.ca/Hal...-Triangle.html
If you find that this system works for you, the Triangulations CD contains 220 sizes of HST's in 1/16 & 1/8" increments, QST's and flying geese plus 18 pages of patterns to make from these basic blocks. The best price I've found on this CD is at Connecting Threads:
http://www.connectingthreads.com/Too...M__D90174.HTML