Custom left-aligned Veelo chapter style in Memoir

Question

I'm trying to make a Memoir chapter style based on veelo, using this custom definition:

\documentclass[a5paper]{memoir}
\usepackage[utf8]{inputenc}

\usepackage{lipsum}
\usepackage{graphicx}
\usepackage[showframe]{geometry}

\newlength{\numberheight}
\setlength{\numberheight}{15mm}
\makechapterstyle{myveelo}{%
    \setlength{\afterchapskip}{30pt}
    \renewcommand*{\chapterheadstart}{\vspace*{10pt}}
    \renewcommand*{\afterchapternum}{\par\nobreak\vskip 10pt}
    \renewcommand*{\chapnumfont}{\normalfont\Huge\bfseries}
    \renewcommand*{\chaptitlefont}{\normalfont\Huge\bfseries}
    \renewcommand*{\printchaptername}{}
    \renewcommand*{\chapternamenum}{}
    \renewcommand*{\printchapternum}{%
        \makebox[0pt][l]{%
            \resizebox{!}{\numberheight}{\chapnumfont\thechapter}%
        }%
        \makebox[0pt][l]{%
            \hspace{\textwidth}%
            \hspace{1.5cm}%
            \rule{2cm}{\numberheight}%
        }
    }%
    \makeoddfoot{plain}{}{}{\thepage}
}

\chapterstyle{myveelo}

\begin{document}
\chapter{Introduction}
\lipsum[1]
\end{document}

An example chapter made with this (with showframe from the geometry package):

The problem is that the number is not aligned, and that the offset depends on the chapter number (1 is quite large, 4 is much smaller, etc.). Is there a way to left-align the number automatically for all chapter numbers?

Answer 1

Too long for a comment. This has nothing to do with memoir but rather a part of the font as can be seen from this example

\documentclass[a4paper]{memoir}
\newcommand\Show[1]{%
  \begingroup%
  \fboxsep=0pt%
  \fbox{#11}%
  \endgroup%
  \par\medskip
}
\begin{document}
\Show{}
\Show{\large}
\Show{\Large}
\Show{\LARGE}
\Show{\huge}
\Show{\Huge}
\end{document}

The box around the number does not fit snugly and the effect is more noticeable as the font size gets larger