You can buy that KXA168 radio ready built!
I have been browsing again and one listing had a variety of prices, starting with the kit only & adding things like a battery, solder, soldering iron and finally a ready-built radio.
It is over 8.00 UKP, wheras the DIY kit is 2.60UKP.
Maybe I should have done that after those 3 failures.
The total sum I spent on the 3 failures is around equal to what I spent on the Soviet 'Almaz' radio I recently did.