Speed Champion Slotcar Chassis
thingiverse
I've got a few chassis that could work well with official Lego cars, and they're just waiting to be built. I haven't had a chance to put them together yet, but I'm confident they'll perform great once completed. If you want to modify the model number 60053, you'll need to do some trimming of bricks - it's not too complicated a process. As for building instructions, I don't have any at my disposal, but I'm pretty sure it won't be a challenge to convert the Speed Champion models into slotcar racing vehicles.
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