There is no manufactured solution for what I want soooo I'm going to be tring a little DIY. I've switched over to only the 100 series + converters but hate them without a thumb grip, BUT you add the thumb grip and no longer have a hot shoe. The only thing I use the hot she for is a flash trigger (center pin only no ttl needed) so I've decided to try and intigrate a trigger into a thumbgrip. For the center pin to fire does the trigger also need to be contacting the ground? I would think so but I feel like I remember a trigger in the past that I used that had a plastic foot and no ground, just the center pin and that would make things a bit easier.