Beginner - Problem Adjusting Pickup Height on MIM Jazz

[Snowman 8]

When I couldn't adjust the pups on the Jazz bass that I just bought from Joelb79, I discovered bubble wrap under one of the the pickups and a loose piece of foam under the other.

Is this normal?

If not, then what is used provide lift/tension so that so that they can be adjusted? Should there be springs on the screws and foam padding or what? Can I get the stuff I need at the local hardware store?

Thanks

Ted

[drwhiteguy]

Anything that works is acceptable. All you need is something that will push the pickups up to the screws; something that is not too easy to compress so you know it will always be pushing back once it is. I use some thicker foam under mine. Bubble wrap is an interesting one, that I wouldn't reccomend.