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
   Code:

   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

1. should be connected to z minimum limit in hal, will check later if i can
2. yes, they are OK
3. yes, remove one of the big power supplies, one of those is more than enough for 3 drives.
-
1. yes, use 8 or 16, not 10
2. no, those should do just fine.
3. no, it is still in development, make the machine work first, fancy stuff later.

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?