I got a pair of SD5, with the same type adjuster. Left lever blade slightly bent, but it looks like the blades are interchangeable. I'll bring 'em.
The pivot on the SD7 levers looka like a rivet, I couldn't see an obvious way to dismantle them.
Mines got like a little circlip holding that pivot, & the same adjustment you describe.
@Emyr started
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I got a pair of SD5, with the same type adjuster. Left lever blade slightly bent, but it looks like the blades are interchangeable. I'll bring 'em.