Good thinking on your part to get back up spacers. Once I spent a couple of hours looking for the darn thing. While cleaning my 22A I forgot to hold my hand over the spring and spacer and out they popped. The spring went one way and the spacer went the other. I finally found the spacer up under a little corner shelf stand. It had to pop over my should to get there.
I had some break down problems with my 22A and had to send it to S & W service. I asked for extra spacers and they sent me several at no cost.
My 22A works like clock work now but it took a little break in time. A friend of mine bought a Sig 22 Mesquito for his wife which is very tempermental. It will only eat CCI high vel. ammo.My cheap little 22A will eat anything.

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NRA & TSRA
Texas CHL Holder