Antenna Amp + FlightAware Filter & USB Stick Question

I currently have a FlightAware antenna and a powered amp mounted about 15 feet off the ground with about 30 feet of coax from the amp to the existing RTL SDR.
Can I just replace the existing RTL SDR with the FlightAware Filter and ProStick stick right at the PiAware, or do I need to take the existing powered amp out of the chain ?

You should be fine without the amp. You can always try both.

OK thanks. I was just thinking that it would result in “double-amplifying” the incoming signal which may result in distortion.
Basically I am trying to avoid getting the ladder out LOL

You will need to reduce the gain a lot.

Check out the gain optimisation scripts.
My FA 1.0 dongle with LMR400 cable, cavity filter and a DPD antenna worked best at 38db.
With an amp, you will probably need to reduce it further.