Longeing/training aids/bitless bridle

[Jiouxles]

Anyone know of any training aid (pessoa type thingies) that can be used with a Dr Cook bitless bridle or a cavesson when longeing? They all seem to connect to the bit and the action is not the same with the Dr Cook.

[No_Angel]

I have used a de gogue with a dr cook, just passed it through the rings on the noseband.

[Jiouxles]

Yes, sort of makes sense. I thought about the noseband rings but wasn't sure. Maybe I'll give it a try. Anyone tell me best diameter for a longeing circle? I could look it up but I'm being idle :p He's 15.1. We do have a round pen but I think it's a bit small for him really.