Thanks for your reply. I finished the build yesterday and I tested with the PPCB wiring (I've got a homemade test board ready with that wiring) and it works OK. The only strange thing is that in the LED pads my multimeter reads 9V, luckly my intuition worked and I didn't soldered any LED.
About your question, I will buy a 1590BB enclosure to have more headroom.Thanks again.