Raspberry Pi 4 with Mesa 7c81

Hello Everyone!
I'm new on Forum but thanks to Yours knowledge You share on forum which I'm very thankful for,  I built my own cnc machine (I'm during completing mechanical parts), but looks that software it working as it should (Z axis already built - the hardest). I'm wondering if someone built up with success configuration rpi4 + 7c81 + 7i77 + mx4660, because I want improve positioning. I'd like to not changing config of current set but only add 7i77, could someone advise me how to do that and if its working at all as it should?
Thank You in advance
Best Regards

You would need a MX4660 +7I77 firmware configuration
for the 7C81. I can make one if that's whats really desired.

I'll appreciate it. I'd like to connect via P1 because i leave it for encoders in future and time has come (based on other users experience). I already use P2 and P7 for communication with mx4660.I've tried to add configuration to pncconf but TXEN2 TXDATA2 and RXDATA2 don't want appear, do someone know what I'm doing wrong?

Thats what inside file:
    ['7c81-Internal Data', '7c81', '7i77 + MX4660X2', '7c81', 'hm2_rpspi',
         7,3, 0,0, 1,1, 0,0, 4,2, 1,2,[],0,0,0,0,0,0,0, 1, 57, 100, 200,[1,2,7],
        # TAB 1
        [S.TXEN2,0],[S.TXDATA2,0],[S.RXDATA2,0],[S.SS7I77M1,0],[S.RXDATA1,0],[S.SS7I77M0,0],[S.RXDATA0,0],[S.MXES,0],[S.MXE0,0],[S.MXE1,0],
        [S.MXEI,0],[S.MXE0,1],[S.MXE1,1],[S.MXEI,1],[S.MXE0,2],[S.MXE1,2],[S.MXEI,2],
        [S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],
        # TAB 2
        [S.GPIOI,0],[S.PWMP,0],[S.STEPA,0],[S.GPIOI,0],[S.STEPB,0],[S.STEPA,4],[S.STEPA,1],[S.GPIOI,0],[S.STEPB,1],[S.STEPA,2],
        [S.STEPB,2],[S.STEPA,3],[S.STEPB,3],[S.ENCA,7],[S.ENCB,7],[S.ENCI,7],[S.GPIOI,0],
        [S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],
        # TAB 7
        [S.GPIOI,0],[S.GPIOI,0],[S.GPIOI,0],[S.GPIOI,0],[S.GPIOI,0],[S.GPIOI,0],[S.GPIOI,0],[S.GPIOI,0],[S.GPIOI,0],[S.GPIOI,0],
        [S.GPIOI,0],[S.GPIOI,0],[S.GPIOI,0],[S.GPIOI,0],[S.GPIOI,0],[S.GPIOI,0],[S.GPIOI,0],
        [S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],
    # TAB 5
    [S.TXDATA0,0],[S.TXEN0,0],[S.RXDATA0,0],[S.NUSED,0],
        [S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0], [S.NUSED,0],[S.NUSED,0],[S.NUSED,0],
        [S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0], [S.NUSED,0],[S.NUSED,0],[S.NUSED,0],
    # TAB 6
    [S.TXDATA1,0],[S.TXEN1,0],[S.RXDATA1,0],[S.NUSED,0],
        [S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0], [S.NUSED,0],[S.NUSED,0],[S.NUSED,0],
        [S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0],[S.NUSED,0], [S.NUSED,0],[S.NUSED,0],[S.NUSED,0],],

 

I'm not sure what you are suggesting

What firmware are you using currently?

I would probably make firmware something like

P1 = MX4660
P2 = 7I77
P7 = GPIO
 

Currently I'm using that:
freeby.mesanet.com/7c81_mx4660x2d.zip

Can I ask You to make it in way:
P1 = 7i77
P2 = MX4660
P7 = GPIO
if it's not plenty of work?
I'm asking because that will help me with arrange space in cabinet.
Thank You in advance

and in connection with photos above
I manually added config for pncconf for 7c81 and 7i77 and mx4660 but something is wrong in comparision to 5i25 + 7i77:
  i cant find where is mistake, everything looks ok, maybe You know?
 

7c81 configuration with 7I77 on P1, MX4660 on P2 and just GPIO on P7: