But if you have 1,610 pieces, and want a challenge, then I give you...LITHIUM!

(sorry, I can't get the video up.)

Parts you will need:

146 green rods

116 white rods

303 blue rods

151 yellow rods

46 red rods

32 gray rods

1 black rod

7 flexi rods

4 tan connectors

94 dark gray connectors

1 blue hinge

2 green hinges

12 light gray connectors

37 orange connectors

72 red connectors

21 green connectors

118 yellow connectors

15 white connectors

162 purple 3D connectors

98 blue 3D connectors

38 orange track connectors

4 red gears

8 blue spacers

12 silver spacers

13 black Y connectors

1 square panel

94 chain links

1 motor

Total: 1,610

...and one ferret (Just kidding!)

## Step 1: Step 1: The Base

Parts needed:

12 green rods

15 white rods

82 blue rods

32 yellow rods

2 red rods

1 black rod

4 tan locks

20 dark gray connectors

6 orange connectors

9 red connectors

2 green connectors

15 yellow connectors

3 white connectors

48 purple connectors

39 blue connectors

2 red gears

4 blue spacers

2 silver spacers

1 PowerPack motor

Total: 294

You'd also need to cut the tubing into three pieces; the speed drops a lot when there's no middle rail.

Again, try it out yourself. I'm sure you can come up with a configuration that works just by using a bit of trial and error.

But yeah, the speed plummets when you don't have the middle rail there.

p.s ur a great knex builder. also do u no where i can buy old knex sets???????????