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My advice would be to plan to make the upgrade, but carry on using that fork in the mean time. It's unlikely to fail in the short term, but the knocking will probably start quite quickly. If you have to do any emergency stops or have an impact then give the fork a quick once over when you can. I would imagine the weak points will be bushings, crown to steerer attachment, stanchion to crown attachment and the dropouts. If everything stays straight and rigid, then you have nothing to worry about.
Can't remember. They've gone out with the garbage 3 weeks ago