Bikejoring

[Belgium]

I have a Belgium Malinois and looking at purchasing equipment to have my dog pull me on a bicycle, tricycle, skateboard or whatever I can think of.

Just trying to decide what works best and have some questions.

If the dog pulls from the front with the antenna, what problems can I expect?
If I purchase the unit that attaches to the seat post how much of a problem is there if the dog pulls to the side?
What can I do to protect the dog's paws?
Any information about training the dog?
Any help would be appreciated.
Larry