New E-mount attached
Those original screws have very small head, so do not make
counter sink holes too big in order to make the mount secure.

If you decide to use a M42->E adapter for M42 helicoid, it is
thinner than my µ4/3->E adapter, so your lens will go over INF.
You can easily adjust the position of the lens block in B28m_10.

If you are planning to use "front end filter" in order to avoid
colour shift and smearing "over-INF" is necessary feature!!