A Simple Sanding Block
I have gobs of those bases to slot car cases, but often do not want them but I am always reticent to pitch them.  I have made little bins out of them to hold screws, cut them up for the plastic, and even dissolved the plastic and made a glue substitute.  That last one should not be done as the solvent is unhealthy.  One guy made a slot car trailer out of one.  Come on guys, we need therapy.

OK, there is one good use for ONE base.  I made a sanding block for one of the guys at the track out of one.  It took me a good 10 minutes.  Most of the time was spent looking for stuff.  I already have a block but decided to make one as simply as possible so people could make one without any major power tools.  The last one I made I cut the board and the slot on a table saw.

I started with a Scalextric base that someone threw away at Fastlane Hobbies.  I didn't want the base but wanted the lid to use either as a parts bin or as a form for a resin mold.  It has a slot in it already and so using this piece eliminated the need for a table saw.

The copper tape came from Hobby Lobby doll house section. It is exactly the same tape as the guys who route their tracks use but is cheaper at the Doll House stores. One of the Bob's will surely ask why I had it.  For my Barbie collection of course. Actually, I have plans to make a routed Salt Flats track to do speed runs on.  36 volts, a red motor, 2/1 gear ratio, Fly truck tires, light chassis, aerodynamic shell.  Can you feel the need for speed?  If you need some tape and don't want to buy it then ask and I will leave some at Fastlane for you. Just cut the two pieces of tape to length and run one piece on each side of the slot.

On the other end I put a piece of sandpaper which is held on by a piece of duct tape as in the following picture.  In the above picture you will notice two screws running into the angled front of the base.  These are the terminals for the power block (wallwart).

The wall wart which is not shown was from a dead scanner. You can buy ones at Radio Shack but if you remind me I will bring one to the track and give it to you.  The wife wants me to do divestiture of junk.  I soldered an alligator clip on the end of each wire. In retrospect I would just solder them directly to the screw or the copper tape as that would be simpler.

One addition that I have not made yet is to glue a magnet on the side. On my personal one I use this magnet to hold little screws when I have the body off working on the chassis.

Another option for power is to rig two 9 volt batteries in parallel (positive to positive and negative to negative) underneath and the thing would be really portable.

Drywall sanding screen can be substituted for sandpaper.