Toggle between macros

Hi there, I'm looking for the functionality whereby I press a key, e.g., 10 and this toggles on and off macro 1. However I also want another key, e.g., 11 that toggles on and off macro 2. Here's the rub if macro 1 is running due to pressing the 10 key, and I press the 11 key for macro 2 - I want it to toggle off macro 1. And vice-versa if macro 2 is running and I press key 10. This doesn't seem possible with the standard functionality via Synapse 3 but I was wondering if some manual shenanigans with the profile XML would allow this behaviour.