Pretty easy install. You can do it with 2 flat blade screwdrivers. One on each side and gently pry it towards the breech until it comes out. Put the new one in and holding the breech knob towards the tank, dry fire, recock and dry fire again. It may take 3 or 4 times to get it properly seated. That's it.
I tried a TT TH on my .25 Talondor and had erratic velocity swings, so did another guy on GTA (Olly). Ended up putting the AF TH back on after red loctite then let it dry. So far, 2 years and no issues. Did the same with my .22 Talondor, 1 year no issues.
Good luck with the TT TH.