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Post  Jason_WI on Fri Apr 24, 2020 6:31 pm

Recreating unobtanium.

The Cox zip starter is most often missing or broken with the GTP, Stocker, or Indy cars on ebay. This is the first version where the gear pitch was a bit off but still worked. Final version printing now.

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Post  davidll1984 on Fri Apr 24, 2020 7:00 pm

is it posible to get new zip from u y pay wat u want for nead 2 or 4 of those for my model wit mising part y also find good way to get rid of black plastic two part back plate changed for jerobee style bebee coper read fuel tank or black widow short tank wit remote fuel line used to cool engine look my post cox gtp mod is info coming on how to preserve model to run in future
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Post  Cribbs74 on Fri Apr 24, 2020 11:21 pm

I don’t know what gearing they are, but those zip starters look very similar to the SSP Racers from the 70’s and also the Kenner “Smash Up Derby” zip starters.

Looks like Jason has figured it out, but it’s an avenue worth exploring.

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Post  getback on Sat Apr 25, 2020 5:50 am

Hot Damn you have did it again , if those will bee available i will take two myself , i have misplaced or lost mine . You the Man Jason!! Small Cox Logo
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Post  Jason_WI on Sat Apr 25, 2020 10:25 pm

Hopefully this time I have the gear pitch dialed in on this version. .25mm does make a difference in gear pitch and eyeballing it with a caliper is not the way to do this. Added a Cox logo and rounded a few edges. Will print when I get home on the big printer and still have to print it diagonally for it to fit decent.

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Post  Jason_WI on Thu Apr 30, 2020 2:08 am

Going to be a while before I can print this. I’m out of PETG and more wont arrive till May 10th. Even the carbon fiber Zytel and natural zytel is all sold out. Everybody with a 3D printer is printing medical PPE.
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Post  getback on Thu Apr 30, 2020 5:17 am

That is understandable Thanks , Jason Small Cox Logo Looks Good w/Logo Very Happy
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