How much deflection to expect...

[Wal]

Thou if your planning on cutting Ali then you'd be better cutting your losses now at this stage before going further and buy some profiled linear rails.

I hear ya Jazz, it's a well known fact that the profile rails are the way to go for superior rigidity, but I think to swap out at this stage would mean too much heartache, ball-ache and expense on what was always going to be a learner build. I may as well build another machine, which I have every intention of doing..!

While I'd like to 'precisely' cut ali on this, think more ornamental than super high precision...

Wal.