16
With some Power Functions elements and a few extra pieces, it's pretty easy to turn the Rally Car into an RC car.
Here's a quick demo video of my design in action.
And here are the instructions I made for it.
Required extra pieces
First you are going to need some extra pieces:
Power Functions:
1x - Servo Motor
1x - IR Receiver
1x - Battery Box
1x - L-...
7
Rebrickable has an option to compare set's main models and some of the B-models as well. However there is no inventory for second model for 8285 set available on Rebrickable. The best I could find is a LDraw file available on Eurobricks.
I've imported this file as a custom list on Rebrickable that could be used to compare with sets and MOCs. Imported file ...
4
You're describing rebrickable:
https://rebrickable.com/
Besides official models, also hundreds of fan created models are available.
It's a terrific resource
4
You can use the Compare Sets function on Rebrickable for that (if the B model is an official model or a MOC on Rebrickable).
Here an example for both official models from the 42069 set.
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