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Finally got around to swapping out the old tension shaft on my SC4 and this SC4-33 part dropped right in with no hassle. The threads were clean and the fit was snug without any wobble, exactly what I needed.

Installed this on my SC4 and it fits the parts diagram exactly, no modification needed. The machining on the shaft is noticeably smoother than the original part I took off.

Replacing the old shaft on my SC4 was straightforward since it’s the exact SC4-33 part, and the fit was perfect with no slop in the tailstock. Threads are clean and it locks up solidly, feels like a proper OEM replacement.