I couldn't find this posted anywhere here so i thought i would post it so heres the thing.
If you switch the AV trinket to another trinket while casting "Recall" It won't go on Cool down more then the 30seconds it takes when you equip it. Thought this might be useful for people collecting Rams/Wolfs or just desperately trying to defend their base.
Haven't had time to test it fully yet since we just won a few seconds after i did it but it seemed to work then.
EDIT: Just tested this some more and the AV trinket it works on but not on Transporters (atleast not the Gadgetzan one)