MESA 7i92TH to power an OmioCNC 3040 LPT system ; which firmware ?

I'm trying to convert my cheap 3040 router with an LPT card to connect to LinuxCNC using a Mesa 7i92TH
Current LPT pinout is :

1 VFD spindle on (CW) , using a small relay
2 X step
3 X dir
4 Y step
5 Y dir
6 Z step
7 Z dir
11 X home in
12 Y home in
13 Z home in
15 probe in
17 VFD spindle PWM (0-2000Hz)

If I read the documentation ( 7i92tman.pdf ) correct the PROB_RFX2D would match it almost perfect , but that file is not in the ti92t.zip from the Mesa website. Which firmware am I best off to use ?

17 VFD spindle PWM (0-2000Hz)

Is this PWM (for a PWM --> analog converter)

or a rate (0 to 2000Hz frequency output)

PWM going into an analog converter indeed

Current config is like this

net spindle-cmd-rpm => pwmgen.0.value
net spindle-on <= spindle.0.on => pwmgen.0.enable
net spindle-pwm <= pwmgen.0.pwm
setp pwmgen.0.pwm-freq 2000.0
setp pwmgen.0.scale 22800.0
setp pwmgen.0.offset -0.0710526315789
setp pwmgen.0.dither-pwm true
net spindle-cmd-rpm     <= spindle.0.speed-out
net spindle-cmd-rpm-abs <= spindle.0.speed-out-abs
net spindle-cmd-rps     <= spindle.0.speed-out-rps
net spindle-cmd-rps-abs <= spindle.0.speed-out-rps-abs
net spindle-at-speed    => spindle.0.at-speed
net spindle-cw <= spindle.0.forward

This Benezan config looks correct:

 

Benezan breakouts have step/dir swapped but this version has
the ability to swap the default step/dir pins with a hal parameter