Fix the rhythm of this paragraph

A passage that is technically correct but tiring to read aloud.

The prose below is correct but reads badly. Work on the sound of it.

Diagnose first:
- Sentence lengths in order, as a list of numbers. Flag any run of three or more similar lengths.
- Sentences that all open the same way, or all use the same construction.
- Repeated words and sounds within a few lines.
- Long subordinate clauses that delay the verb.
- Places where the stress lands on a weak word at the end of a sentence.

Then rewrite, varying the length deliberately. Put a short sentence after a long one when a point needs to land.

Show the before and after of the three sentences you changed most, and say what each change does.

Text:

Polish and final checks. Sentence-level style, proofreading, consistency and one last critique before it ships.