Picture of Fenrir119's Knex Ball Machine Elements
Original elements from my various ball machines, all in one place. I will keep this updated, adding more elements with each ball machine.
Photo is from Space Tower.
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Step 1: Wheel

Picture of Wheel
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A different sort of wheel that I hadn't seen before. From Four Flags.

Step 2: Flat Spiral

Picture of Flat Spiral
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A variation of Kairah's spiral from Metropolis. Uses track connectors instead of gold connectors.
Used in both Derezzed and Space Tower.

Step 3: Dual Track Connector Path

Picture of Dual Track Connector Path
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A new path I created for Skill Shot. Can be used in place of gold connector path in most applications. Very smooth, pretty easy to make. Turns aren't very difficult. Photos from Skill Shot, Derezzed, and Space Tower.

Step 4: Micro Roller Coaster Path

Picture of Micro Roller Coaster Path
Similar to Knextreme's path found here, this path uses two pieces of micro roller coaster track as rails. Micro pieces connect the two rails, and transition pieces can easily attatch it to a tower, as would be done with a micro roller coaster. Turns are easy, drops are next to impossible (unless you have the curved rails, which I do not). Last photo shows some of the possibilities for connecting the two rails. The rest are from Space Tower.

Step 5: Roller Coaster Bridge

Picture of Roller Coaster Bridge
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A simple way to use three railed roller coaster track to bridge gaps. This technique minimizes sagging. Use the dark orange rods for the bottom rails, and put the track connector in the separated spot so that it cannot slide. Put a red rod through the center, and a blue spacer on each end. This prevents the rod from sliding through the connectors, which is what would cause the track to bend. Middle rail on the bottom is optional. Photos from Space Tower and Derezzed.

Step 6: Alternate Elliptica Rails

Picture of Alternate Elliptica Rails
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Since I don't have many gold connectors, I made alternate rails for the IAC's elliptica that use green track connectors.
IAC's instructable is here.
The rails are a little closer together, so the axle needs to be adjusted as well.
The top half attaches to the blue connectors at either end.
From Derezzed.

Step 7: Micro Path

Picture of Micro Path
Basic 3-railed path, but made with micro pieces. From Space Tower.
Nice elements. Especially creative with the roller coaster connectors for the eliptica. Hope to see more soon!
I have about 8 of the gold connectors, so I improvised. Same thing with the flat spiral. Track connectors can replace gold connectors in a lot of ways, if you're willing to take the time to figure out how to attach them.
I have the opposite problem...about 24 gold connectors and 0 coaster connectors. However, I bought a bunch of K'nex this weekend so hopefully that situation will be changing! :-D
I really like how you made that flat spiral with rollercoaster pieces. Other elements are nice as wel.