[0-30V Stabilized Power Supply]

I have already ordered that. I tried it to have some experience but it didn't go as planned :/.
Either way, thank you.

[0-30V Stabilized Power Supply]

Hi, I have a problem with output voltage. when it's measured without the load I can only adjust it from 0.7V - 2V. However with 820 ohm load it can only output 0.8V - 1.2V. I can't find any high resistance "roads" (don't know how to call them) on the pcb. Any ideas what can be wrong with it? The schematic is a bit adjusted from: https://www.electronics-lab.com/project/0-30-vdc-stabilized-power-supply-with-current-control-0-002-3-a/.

I attached eagle .brd file and screenshots from the same file. Also I use 100k and 10k pots. to tune and fine tune the voltage and current  (can this be the problem?)

The transistors are 2n3055, two together with 0.1 ohm resistors at each emitter. 

Thank you for any advice. 

PCB.sch