If you want it to be a lot easier, go for the IBU2 or the Asp. Way better sound, much easier install, and with an IBU2 you would not have needed the trigger switch and could've kept the old airsoft unit in your Jagdpanther. The bad part is that you either learn to live with cannon sound and BB fire being a bit off, or you spend lot of time fine tuning the timing on the micro SD card. That's my only complaint about the IBU2 in an airsoft tank. The Asp is (IMO) the best tank board on the market today (to be fair, I have not tried the elmod). Here's a quick video of a Taigen Tiger One with the Asp board, it's an airsoft tank, and has barrel recoil. I'll stack this tank up against any airsoft tank in the world and dare them to tell me their tank will do more cool stuff than mine will. And if their tank WILL do more cool stuff than mine, I want to copy it!

https://www.youtube.com/watch?v=-4Kk89AwnDc And since I have two extra wires in the slip ring I've just decided to add an LED machine gun in the turret where the airsoft LED is, and with the Asp it has a separate plug in for machine gun 2 and a separate switch so I'll be able to fire hull or turret mg with separate switches and both will have LED and separate sound. And here I foolishly thought I was all done upgrading this tank!

One thing to be said for the TK22, at the end of the day it's still about 50 bucks cheaper than either the IBU2 or the Asp. To me the extra money is well worth it. The sound alone on either the IBU or the Asp makes it worth the extra money.