FM Radio Receiver kit with IC TA7358 & TA7640AP

I bought this kit for IDR 48500 (+/- USD 3.41) in one of the local online marketplaces.
This kit is a mono fm radio kit that uses IC TA7358 as front-end and IC TA7640AP as FM IF processor.
The audio output of this kit still requires a power amplifier before it is fed to the speakers.

Need adjustment on Polyvaricon Variable Capacitor (PVC), the oscillator trimmer for correct frequency tuning & RF trimmer for best signal reception.
Adjustment for IF coils for better audio output.

After all adjustments, I found that the sensitivity is not good, it's fine for strong signal reception.

Overall performance is below my expectation. my DSP FM receiver, Philips radio, and FM receiver with Tuner Block Mitsumi FAE-347 can perform much better.