Hey Brandon,
The HL and TG boards are actually different and the RC5HL will not work with our boards. RCTA did make a small batch of RC5TG version boards, but I'm not sure if he still has any atm. We are however working on a new board that will let you use the stock transmitter or your own though so it might be worth it to wait for it
I would send RCTA a message and see if they have any sitting around, you never know!