The bends are not distinct enough to reliably click on them to adjust them. The bends are not very visible and that makes it a hit or miss proposition as to whether I click on a bend or on a line. It is pretty aggravating to try to click on a bend, only to move the whole line and mess up the locations that have already been adjusted.
I found improvement when I turned the color coding for the pipes off, reduced the line size in the options menu, and increased the "handle size" to 7 in the options menu. The pipe color coding was hiding the "handles" because the line thickness used when color coding. The program still tends to select the pipe instead of the bends.