Step 1: Gut It!
Most LED lights should be straight forward. I suggest using a bike light that has four or more LED's on it, so that you have at least one light per wheel.
To get the through-hole LED's out, the best method is to use one of those little solder sucker things you see at radio shack that look like turkey basters. Once you get a decent amount of the solder off the joint, use some desoldering braid to get the remaining off the pad.
Once you're there, all it takes is a bit of pressure to the leads of the LED and it should fall out.
Step 2: Wire It Up!
At this point, one of my concerns was placement of the controller board, which added to my point of keeping the wires long.
If you aren't confident enough in your organization, do what I did and attach the LED's to the 18" wires, so you can get a good idea of where things are going.
Step 3: Lay It Out
This is optional, and some trucks don't usually have this little gap in the base. Use the best of your judgement to do what's best in this step.
Step 4: Tack It Down
I found that the most effective way to set up the LED's is to have the wire go into the notch on the top side of the axle and come out just slightly into the wheel (If your wheels are somewhat hollow) without dragging on it. I was fortunate enough to have a perfect fit.
I tacked it down with some strips of duct tape and poured some plastic epoxy over the wires in the little notches above the axle.
The only reason why I chose to use plastic epoxy is because it dries clear. I didn't want a big glob of ugly off-white on my trucks. I have yet to see if this stuff will stick. It's all in preference, but I do recommend some type of epoxy.
You can usually find a tube of the stuff (comes in two parts in one package) just about anywhere for less than 5 bucks.
Step 5: Assemble
The only two things to do now are to attach the circuit board and organize the wires.
I just used more epoxy on the circuit board and set it right on the deck of my skateboard.
As for the wires, a few dobs of super glue here and there will keep them from looking too tacky.
Step 6: Test It! Make It Pretty
I tried it, and I had a blast!
After that I decided to hide the wires a little better. Fortunately for me, my hotdog board came with some toppings. I'm not a big fan of ketchup, but onions and relish are amazing. They worked perfectly for hiding the wires.
Thank you for following my first Instructable!