1rst build, time to do next step

[JAZZCNC]

Wow your really making that harder and more expensive than it needs to be.? Also has a flaw.?
First I'd use Steel for the frame and save 600eu.!! . . but that's not what I mean here.?

Orientate the side profiles on there edges and you'll gain strength and be able to do away with those aluminium braces and the 2 long middle profile, then Extend the 3 uprights to meet top rail.
Put the ball screws on the outside and make drop brackets part of gantry sides, sides will be shorter than drop bracket, less material,weight,money. Easier to setup and adjust screws/motors has they are more accessible. Then you can line the inside walls doing away with the slot and stop crap hitting the screws completely.!! . . . . Your way has a BIG flaw in that it will allow chips into the sides, still hitting screw and eventually filling up the sealed cavity.
You'll be constantly cleaning it out and believe me it won't take long to fill the void between middle profile and slot. Chips spray in a linear direction off the cutting tool and that Gap is in direct firing line so you'll be surprised just how much disappear thru it.!. . . . Kid you not Bet I could fill that gap with alu chips within 3weeks and that's allowing for sizeable percentage not hitting slot gap.!!!!

One other thing.?. . . If those bed supports are 45x45 then I think you'll find there not strong enough at that length and allow bed to potentially bow in centre when cutting or plunging. My suggestion is to put 2 or 3 45x90 on there edge for main supports and make rest up with 4x45.

Sorry to keep pulling at your designs but with experience these things just jump out at you and I'd feel shit if didn't mention them, then at later date you came back and said wished I'd done this or that which I'd spotted.!!