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Few problems using GnuPlot 5.0 on Mac OS X

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I have tried gnuplot for a plotting need in the past, but found the overhead for the task I wanted to accomplish way too high. Still, I see people touting the application, so today I decided to go all in and figure out how to make it do what I wanted. I downloaded the source for 5.0.7 and the accompanying manual. I built it on OS X 10.12.5 with Gnu toolchain (./configure;make;make install) and took off.

I wanted a vertical bar chart, with text labels overlaying the bars. Starting from several examples and the manual, along with a lot of hacking, I have what I want, sort of. However, along the way, I found numerous items that didn't work as documented. Maybe someone can help me determine if this is me, if what I don't know about gnuplot is lacking or if there are some opportunities for improvement.

Here is my script. 

8><----------------------------------------------------------------------------------
# I had to amend my data by adding 4th and 5th columns to control the label position and rotation. 

$Data <<EOD
1 13 "Abcd NOC Handling" 50 -90
2 43 "Abcd T3 Team for SLI" 50 -90
3 12 "Abcd BBNOC" 50 -90
4 53 "Abcd Efghij Support" 50 -90
5 21 "Efghij Response Time" 50 -90
6 47 "Efghij replicating problem" 50 -90
7 11 "Efghij workaround to staging" 50 -90
8 43 "Abcd/Jari verify staging" 50 -90
9 86 "Efghij workaround to production" 50 -90
10 5 "Abcd confirmation/resolution" 50 -90
EOD

set terminal pngcairo transparent enhanced font "arial,10" fontscale 1.0 size 500, 350
set title "Time for Major Steps In P1 Resolution"
set style fill solid 1.0
set style textbox opaque noborder
unset key
set boxwidth 0.75 abs
set bmargin at screen 0.1
set tmargin at screen 0.9
set angle degrees
unset xtics
set yrange [0:100]
set ylabel "Seconds"

set label right # does not work - seems to be stuck at center

set output "p1-times.png"

# Fails to rotate
# set label rotate by 90
# plot $Data using 1:2:3 with labels


# like to be able to insert constant values instead of columns 4 and 5, but how?

plot $Data using 1:2 with boxes, '' using 1:4:3:5 with labels rotate variable



## set terminal aqua ## doesn't appear in list but in the manual
##                   ## (after I installed the aquaterm application).
8><----------------------------------------------------------------------------------

All my questions/problems are in-line, but just to reiterate
1) Right justification for the labels failed to work
2) Setting fixed rotation for the labels didn't work
3) Since I needed to specify a fixed y-value for my labels as well as their rotation, I thought it would be nice to be able to specify constant values instead of having to amend my data, but I could not determine how to do this.
4) I was seeking a rapid REPL since I tried about a thousand variations. I thought maybe the Tkcanvas or aquaterm would give me that, but didn't work. Perhaps those have to be present/specified at build time. Is there a better REPL?

BTW, the data above is the extent of what I was working with. I probably could have drawn this by hand in a time much shorter than the 3 hours I spent on it. Steep learning curve.

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Few problems using GnuPlot 5.0 on Mac OS X Kevin Buchs <kevin.buchs@gmail.com> - 2017-08-21 15:34 -0700
  Re: Few problems using GnuPlot 5.0 on Mac OS X Ethan A Merritt <EAMerritt@gmail.com> - 2017-08-21 22:47 -0700
    Re: Few problems using GnuPlot 5.0 on Mac OS X Kevin Buchs <kevin.buchs@gmail.com> - 2017-08-22 07:11 -0700
      Re: Few problems using GnuPlot 5.0 on Mac OS X Ethan A Merritt <EAMerritt@gmail.com> - 2017-08-22 09:27 -0700

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