What are alternates?
An alternate or C-model is a different model (than the main model) that you can build with the bricks from just one LEGO® set. So you don’t have to buy additional bricks and you can have more building fun for the same value!
I think it’s unfortunate that most LEGO® boxes only come with one alternate model (or none at all). And then I discovered Rebrickable! Lots and lots of alternate models can be found on that website. But the newer and bigger Technic models have very few alternates. So I decided to build some myself. I also learned how to make building instructions. As I am not a fan of building from step-by-step pictures, I also made instructions for alternates that where not designed by me. If the designer permits it, I will put them here too.
If you have made a cool alternate model, make building instructions for it and share it on Rebrickable.
THE ALTERNATES SO FAR...

The 10265 main model

The 10295 main model

The 42055 main model

The 42068 main model

The 42069 main model

The 42070 main model

The 42071 main model

The 42078 main model

The 42079 main model

The 42080 main model

The 42082 main model

The 42096 main model

The 42098 main model

The 42110 main model

The 42121 main model

The 42122 main model

The 42123 main model

The 42127 main model

The 42128 main model

The 42136 main model