I'm wavering between the Signal or the Fireboard 2 for my backup probe system. Has anybody used both and has a clear preference?. Many of the reviews I'm reading lean towards the Signal. It looks like the Fireboard has better battery life but both work while charging... The Fireboard having the extra ports is nice but you have to buy the extra probes where the Signal looks like it comes with them all. It's also Thermoworks and I have a few of their other thermometers... It's a lot of $$$ so I want to make sure I make an informed decision. I've read a lot on here about different probes but didn't see anything directly comparing the two... Any suggestions for the Signal or Fireboard?