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Have a problem with the safety knob, it appears to be assembled properly. When the bolt is closed and ready if you try to press the safety knob forward it stops just short of clearing to rotate.
IIRC the distance from when it stops to the position needed to rotate is about 2-3mm.
I sorted mine today after a better than expected trip to the urologist. It appears to have been an abuse issue. See below (I had to wait for lunch break, but couldn't wait to get started):
No photos yet, but I'll try and describe my findings.
The movement limiting points on the safety system appear to be the top of the small lug located just behind the bolt handle on the bolt itself and a flat on the forward partial ring of the safety. As seen from the front of the safety looking rearward, the engagement point is at about the 10 o'clock position, assuming that the small lug on the outer shroud which enters the firing pin extention/sear cut on the receiver is at the 6 o'clock position. (Yoikers! That would be much easier w/ illustrations!)
At any rate, the safety had a large burr overhanging the rotation stop face, preventing actuation. A combination of peening and filing (small diamond file worked best) the burr flush allowed the safety to rotate far enough to engage. I can only guess it was forced off the wrong way somehow, otherwise I've NO idea how it was distorted!
In the case of a mismatched rifle, I can see how slight variances in the stop faces would prevent things from functioning properly, so if your safety isn't burred up, I would suggest slightly dressing down the top surface of the bolt lug ( I don't believe this small lug serves any other purpose so it was probably where fitting was done originally, rather than attempting to cut on the harder and less accessible safety shroud face.
I eliminated several other likely areas that might prevent sufficient safety rotation for this example, so maybe this will sort your difficulty as well, P-07ShortLee.
If not, we'll cipher on your drama some more! I'm happy I got the chance to work on it so soon. Unexpected, that.
I think you've nailed it, I'll have a look later.
Thanks