删除圆形图或其他图中的白色顶部颜色

Question

从其他问题我已经弄清楚了如何删除硬编码阴影：\tikzset{every shadow/.style={fill=none,shadow scale=0}}以及如何删除硬编码边框border color=white

我最后想做的是删除渐变填充。我看到了底部颜色的选项，但当我尝试添加顶部颜色时，它会破坏构建。有没有类似于顶部的解决方法？

%TikZ & Smart Diagram requirements
\usepackage{tikz}
\usepackage{etoolbox}
\usepackage{xparse}
\usepackage{xstring}
\usepackage{standalone}
\usetikzlibrary{shapes,arrows,trees,shadows,positioning,chains,matrix,calc,automata,intersections,%
                shapes.geometric,shapes.symbols,%
                shapes.arrows,backgrounds,fadings,%
                decorations.text,decorations.pathreplacing,decorations.pathmorphing,%
                arrows.meta}
\usepackage{bm,times}
\usepackage{pgf}
\usepackage{smartdiagram}
\usesmartdiagramlibrary{additions}    
\begin{document}
\tikzset{every shadow/.style={fill=none,shadow scale=0}}
\smartdiagramset{
uniform color list=teal!60!teal for 5 items,
circular final arrow disabled=true,
circular distance=2.25cm,
arrow tip=to,
arrow line width=2pt,
border color=white,
additions={
additional item bottom color=teal!60!teal,
additional item border color=gray,
additional item shadow=drop shadow,
additional item offset=0.65cm,
additional arrow line width=2pt,
additional arrow tip=to,
additional arrow color=teal!60!teal,
}
}
\smartdiagramadd[circular diagram]{a,b,c,d,e}
{above of module1/Start,right of module5/End},
\smartdiagramconnect{to-}{module1/additional-module1}
\smartdiagramconnect{-to}{module5/additional-module2}
\hspace{2cm}
\smartdiagramset{module shape=diamond,
font=\scriptsize,
module minimum width=1cm,
module minimum height=1cm,
text width=1cm,
circular distance=2cm,
circular final arrow disabled=true,
}
\smartdiagram[circular diagram:clockwise]{Set up,Run,Analyse,Modify~/ Add}
\end{document}