Drake TR-7
1978 - AM/RTTY/SSB/CW transceiver. I added the WARC bands and changed the band PROM into EPROM. Some ToDo's are left: The pull up resistor values for the PROM inputs are too high...
Very nice to word with. No trouble at all!

Elecraft K3/100 & P3 (kit version)
2013 - Learning how to operate this rig blind like a flight pilot. So much functions. Some are important. Much more functions are not important.
Have some trouble with the rubber like keypad. It's too early to say more...

Hallicrafters SX-148 & HT-46
1965 - SSB/CW receiver/transmitter rig with tubes, calibrated and restored by myself and 100% working! Very stable and accurate VFO.
Filters:SSB 2.3kHz, CW 500Hz.
Without clicks, without chirps, without hanging CPU, without need to update the firmware...
Sad to say there is no sidetone generator inside.

Heathkit HW-8
1978 - QRP CW tranceiver. My very first rig ever before. It becomes my friend to several years. I changed the audio filter. Even in 1980 it was very difficult to operate in CW with bandwiths around 5kHz.