Could have put some wire in the letter as well if i had known.... ;)
Good luck having a go at the building of the radio.
Made some for last years Jota/Joti for the group we did the radio setup.
Made some pcb's and parts solder, soldering stations and each of the builders had a licensed radio ham with them to go through the steps of building and testing.
Never seen so much happy faces when they recieved their first stations without batteries on their homemade reciever ;)
That magic will never go away.