Vertical Alignment and Invisiable Dot - graphviz

Question

Trying to put all thick bordered items into a vertical alignment. How do I do this?
Also, I'm trying to get the empty dot, where the two lines combine into one, to go away so the edges are connected. They are denoted by the "i*" naming convention. Specifically for this, I want the two lines to merge back together then attach to the next item. I tried the concentrate = "true" and that did not work as expected. The lines basically did not merge back together.
digraph G {
concentrate = "true";
node[shape="box", style="rounded"];
{
start [penwidth = 2.0];
end [penwidth = 2.0];
}
// PROCESS
node[shape="box"];
{
calc [label = "Calculate\nSelected\nValues", penwidth = 2.0];
deployPara [label = "Deploy\nPatachute" ];
bldMsg [label = "Build\nMessage"];
sendMsg [label = "Transmit\nMessage"];
sleepCycle [label = "Sleep\nCycle", penwidth=2];
}
// Decision
node[shape="diamond", style=""]
{
decidePara [label = "Decide\nDeploy", penwidth=2];
decideMsg [label = "Decide\nMessage", penwidth=2];
}
node[shape = point, width = 0, height = 0];
{
iDeploy
iMsg
}
start -> decidePara
decidePara -> iDeploy [label = "No", arrowhead = "none"]
decidePara -> deployPara [label = "Yes"]
deployPara -> iDeploy [arrowhead = "none"]
iDeploy -> decideMsg ;
decideMsg -> iMsg [label = "No", arrowhead = "none"];
decideMsg -> bldMsg [label = "Yes"];
bldMsg -> sendMsg;
sendMsg -> iMsg [arrowhead = "none"]
iMsg -> sleepCycle
sleepCycle -> end;
{rank=same; decidePara deployPara}
{rank=same; decideMsg bldMsg sendMsg}
}
Edit the image commenter sees is:

Answer 1

Changes:
splines=false (assuming you want straight lines)
gave all nodes needing alignment a group attribute (see https://graphviz.org/docs/attrs/group/)
changed size of i* nodes to fill in the gap
also used headclip & tailclip attributes (https://graphviz.org/docs/attrs/headclip/) to fill in the gap (not sure if needed)
digraph G {
concentrate = "true";
splines=false
node[shape="box", style="rounded"];
{
start [penwidth = 2.0 group=S];
end [penwidth = 2.0 group=S];
}
// PROCESS
node[shape="box"];
{
calc [label = "Calculate\nSelected\nValues", penwidth = 2.0];
deployPara [label = "Deploy\nPatachute" ];
bldMsg [label = "Build\nMessage"];
sendMsg [label = "Transmit\nMessage"];
sleepCycle [label = "Sleep\nCycle", penwidth=2 group=S];
}
// Decision
node[shape="diamond", style=""]
{
decidePara [label = "Decide\nDeploy", penwidth=2 group=S];
decideMsg [label = "Decide\nMessage", penwidth=2 group=S];
}
node[shape = point, width = .01, height = .01 group=S];
{
iDeploy
iMsg
}
start -> decidePara
decidePara -> iDeploy [label = "No", arrowhead = "none" headclip=false]
decidePara -> deployPara [label = "Yes"]
deployPara -> iDeploy [arrowhead = "none" headclip=false]
iDeploy -> decideMsg [tailclip=false]
decideMsg -> iMsg [label = "No", arrowhead = "none" headclip=false];
decideMsg -> bldMsg [label = "Yes"];
bldMsg -> sendMsg;
sendMsg -> iMsg [arrowhead = "none"]
iMsg -> sleepCycle [tailclip=false]
sleepCycle -> end;
{rank=same; decidePara deployPara}
{rank=same; decideMsg bldMsg sendMsg}
}
Giving: