Trouble angling edges

[dbalick]

First, many thanks for tikz-feynman, as well as for simpler-wick. I'm using both at the moment and they're relatively intuitive.

However, I'm still getting used to some of the placement options. I'm working on a stochastic field theory where I need directed diagrams and I am having trouble getting vertices to show up at the right angle. For example, I generated a diagram using the following:

\feynmandiagram[scale=0.7] [horizontal=i1 to f1] {
i1 [crossed dot, label=(\mu)]
-- [fermion] a[label=right: (N_3)]
-- [fermion, quarter left] b[dot, label=below:( s)]
-- [fermion, quarter left] c[dot, label=left:( s)]
--[fermion] f1,
a--[fermion, quarter right] d [dot, label=(s) ]--[fermion, quarter right] c,
i2 [crossed dot, label=(\mu), in=45, out=135]--[fermion]b,
i3 [crossed dot, label=below:(\mu), in=45, out=135]--[fermion]d
};

This produces this diagram:

(This is the same as the diagram produced without the in and out keys for the i2 and i3 vertices. I tried putting the in/out here instead of in the momentum, because doing that resulted in a wiggly edge. Obviously this isn't correct.) What I was hoping to do was angle these vertices so that they are to the left of the s vertices in the loop (due to the temporal flow I am trying to represent). I know the angles I am using are incorrect for the i3 vertex, but no amount of playing around with this seems to work. I made a second diagram using:

\feynmandiagram[scale=0.7] [horizontal=c to f1] {
i1 [crossed dot, label=(\mu)]-- [fermion] a[label=(N_4)]-- [fermion, quarter right] b
-- [fermion, quarter right] c--[fermion] f1,
a--[fermion, quarter left] d [dot, label=below:(s) ]--[fermion, quarter left] c,
i2 [crossed dot, label=(\mu)]--[fermion]b,
i3 [crossed dot, label=below:(\mu)]--[fermion]d,
i4[crossed dot, label=( \mu )]--[fermion]a
};

This one automatically seems to be right justified rather than centered, let alone left justified:

Is there some way to move the default vertical vertices to the left a bit (or more than a bit)? I tried using the spring electrical layout, the tree layout, using [same layer], and attempted to change a variety of other options without any luck. After scouring the internet with no leads, I decided to ask you directly.

If you have the time, any advice you have would be very much appreciated.

Thanks again for an incredibly useful package!

[PS: I'm also having some issues using \wick with TeXShop on my Mac, if you'd like any feedback. No big deal though.]