Last weekend I was trying to shoot a model on the beach at sunset, and could not get my 430EXII to fire off-camera using the 60D's built in wireless functions. I can only assume there was too much ambient light for the pulse from the popup flash to reach the 430's sensor because once I was back indoors everything worked fine off-camera again. So, it's time to consider radio poppers right? On Amazon I found a set of CowboyStudio NPT-04 4 channel triggers, with 1 transmitter & 2 receivers for like 30 bucks. I know CowboyStudio is notoriously cheap stuff and for professional purposes it will not hold up, but I have a light stand & umbrellas from them that suit my needs just fine and the reviews on Amazon are strong...so do you think it'd be a worthwhile upgrade for outdoor shooting, or should I stick with my built in wireless 'til I decide to bite the bullet & pay for some pocket wizards or something?