Thanks Jim ;

Here is the link : ModularGrid Rack

I already tried vcvrack, mirack legacy and other stuff but need to try physical.
The 44 x 4 is a start but I want it to be my first system, practical to travel with,
train and go deep into 1 or another module, maybe play for friends time to time or in the street...

After that, I'll consider to invest more, will surely buy something like intellijel palette case and then manage a room space for the suite, if I want it growing more as a studio practice/laboratory for preparing next nomad period.

So it's important to me, so far, to think with my budget ; the system you saw will take me all the year rest to buy.
That's why I have no need to worry about the lake of space at the moment ;)