config all good on mesa 7i96s?

Hello everyone,I've recently converted a second hand CNC router from Mach3 with ESS to LinuxCNC with a Mesa 7i96s board. I've used PNCconf to generate my initial configuration, but I'd appreciate if someone could review my settings and let me know if everything looks okay.Machine Specs:

• X460, Y750mm, Z300   
• 20mm linear rails
• 10mm pitch ballscrews, 20mm diameter
• Construction: aluminum profiles bolted to 12mm steel plates, welded gantry sides
• Motors: Y-axis 6.8Nm stepper, Z + X-axis 3Nm stepper
• Drives: DM556 V1 48v
• Spindle: 24K RPM 2.2kW ER20
• inductive endstops 
• good latency values mostly sub 3000ns servo

PNCconf Settings:

• Step On-Time: 5000 nanoseconds
• Maximum Velocity: 3000 mm/min
• Maximum Acceleration: 400 mm/sec²

Key Config Values from INI File:

• X travel: -2.0mm to 460.0mm (STEP_SCALE = -200.0)
• Y travel: -2.0mm to 750.0mm (STEP_SCALE = 200.0)
• Z travel: -300.0mm to 0.01mm (STEP_SCALE = -400.0)
• Step timing: DIRSETUP/DIRHOLD = 10000ns, STEPLEN/STEPSPACE = 5000ns

Questions:

1. I see a

   z-neg-limit

   signal in my HAL file that doesn't seem to be connected to anything - is this a problem?
2. Are my velocity and acceleration values reasonable for this type of machine?
3. Any other issues or recommendations before I start cutting?

changes/upgrades
As I am already in the process of messing with the machine, would you recommend any meaningful upgrades or changes to it? I will mostly mill soft materials like wood but also want to try aluminium. 

1. should I change the microstepping ( it is 10x at the moment)
2. other stepper motor or drivers?
3. switch to s curve compact fork?

I've attached HAL and INI files below for reference. Thanks in advance for any advice!

 

Edit seems to brake the original post, ini was missing

thank you, I switched the drives to 16x and configured probe basic and a tool changing subroutine, seems to be working fine.

Probably the two power supplies are not necessary, but it was like that when I bought it. Any cons leaving it as it is?