Helios 44m4 Nikon mount, Infinity Focus Modification

Alternative mounting plate for the Helios 44m-4
May or may not fit the other revisions.

Carefully unscrew the four screws at the back of the lens to remove the M42 mounting bracket.

Unscrew the center lens-element. Be careful not to get any dust in. Slide over the 1.5mm spacer ring. Screw back in.
-Alternative, more complicated but perhaps better method below

Use a hobby knife to adjust the screwholes so they fit exactly right. Screw down the rear plate using the original screws. Make