You don’t need the smaller switches for a throwing chicken. The stock ones will work just fine (I just finished mine), you will have to bend the wires on the firing button to get it to fit in the space but take it slow and easy and it’ll work just fine.
As stated above the switches that come with the GBfans kit will fit in the TC wand. I have them in mine and no issues! You do have to bend the prongs like said above but it’s no big deal.