I also tested the PSU with the PSU Shorter, with zero ohm load, to check it's stability when there is a short on the output.
Please have a look and tell me what you think.
1. LM358, 3x TIP35C, Vout=27V, Imax=2.98A
121_000, 121_001
2. LM258, 3X2N3055, Vout=28V, Imax=3.29A
122_000, 122_001
3. On the shunt resistor, LM358, 3x TIP35C, Vout=28V, Imax=2.98A
120_001
The main thing that I don't understand is the waveform marked by the red arrow (121_000_arrow).