Great idea! I would recommend sacrificing one of your champ or equivalent plastic throwers for a dog toy. Head out to the field and play fetch! I have found this activity to be a great way to work on smooth form and tire out my dog.
DX works fine too but gets chewed up quick - plus my DX cobra drew blood from my dog and I saw another thread where someone reported the same issue. The difference in doggie wear rate really put the insane durability of champ plastic in perspective.
EDIT: DX cobra made her gums bleed a bit - not from a direct hit.