I took a quick look at the surface planer last week ( completely visual, I didn't try to turn it on or operate it in any way ) and from what I can see, it still needs some work. The safety guard is a home made copy of those slide aside "boomerang" guards you see on old models or in the USA. They're illegal here as far as I know and the one fitted to the machine seems to be entirely passive (there's no spring). It really needs a bridge style guard fitted in my opinion.
Apologies to any maintainer who may have put in work or has work planned regarding the above if it seems as if I'm being critical. The above is just what I've been taught regarding safety.
Neeam, depending on what you're trying to achieve, there are several other approaches you can take that don't depend on the surface planer.
If you need to flatten a board:
You can use hand planes, winding sticks, a straightedge and a pencil.
You can create a flat sled, support your piece with some shims and pop on some hot glue if necessary and use the thickness planer
You can create a router sled from a few straight pieces of wood.
If you want to joint an edge, a pattern bit, a straight edge and a router table can be used in a pinch or you could again grab a hand plane, the longer the better (no. 7 ideally)
I've used all of the above methods and with care they'll all work well. Good luck!