Suggestions For Optimizing 1967-68 Speed Racer DVD's Upscale

[LouieChuckyMerry]

Hello, and Happy Saturday . I'm wanting to upscale my Speed Racer DVD's and was looking for help to improve the encodes' sharpness. Using an updated version of the script I finally settled on for my Simpsons DVD's, this is my current script:

DGDecode_mpeg2source("Path")
### Deinterlace-Match Fields-Decimate ###
Function FieldMatch(Clip C) {
    PP = C.DuplicateFrame(0)
    CC = C
    NN = C.DeleteFrame(0)
    P2 = PP.SeparateFields
    C2 = CC.SeparateFields
    N2 = NN.SeparateFields
    PC = Interleave(P2.SelectEven,C2.SelectOdd).Weave
    CP = Interleave(C2.SelectEven,P2.SelectOdd).Weave
    CN = Interleave(C2.SelectEven,N2.SelectOdd).Weave
    NC = Interleave(N2.SelectEven,C2.SelectOdd).Weave
    Deint = CC.QTGMC.SelectEven
    SSS="""
        \   !CC.IsCombedTIVTC(CThresh=12,Chroma=True,BlockX=16,BlockY=32) ? CC
        \ : !NN.IsCombedTIVTC(CThresh=12,Chroma=True,BlockX=16,BlockY=32) ? NN
        \ : !CN.IsCombedTIVTC(CThresh=12,Chroma=True,BlockX=16,BlockY=32) ? CN
        \ : !NC.IsCombedTIVTC(CThresh=12,Chroma=True,BlockX=16,BlockY=32) ? NC
        \ : !PP.IsCombedTIVTC(CThresh=12,Chroma=True,BlockX=16,BlockY=32) ? PP
        \ : !CP.IsCombedTIVTC(CThresh=12,Chroma=True,BlockX=16,BlockY=32) ? CP
        \ : !PC.IsCombedTIVTC(CThresh=12,Chroma=True,BlockX=16,BlockY=32) ? PC
        \ : Deint
    """
    Args="CC,NN,CN,NC,PP,CP,PC,Deint"
    Return CC.GScriptClip(SSS,Args=Args,Local=True)
}
TFM(Order=-1,Mode=5,PP=2,Clip2=FieldMatch(),Slow=2,MChroma=False,UBSCO=False,CThresh=12,Chroma=True)
TDecimate(Mode=1)
### Fix Line-Doubled Fields ###
NNEDI3(Field=-2)
Merge(SelectEven(),SelectOdd())
### Color Conversion ###
ColorMatrix(Mode="Rec.601->Rec.709")
### Color Adjustment ###
MergeChroma(aWarpSharp2(Depth=16))
### Crop ###
Crop(8,0,-8,0)
### Gibbs Noise Block ###
Edge=MT_Edge("prewitt",ThY1=20,ThY2=40).RemoveGrain(17)
Mask=MT_Logic(Edge.MT_Expand().MT_Expand().MT_Expand().MT_Expand(),Edge.MT_Inflate().MT_Inpand(),"xor").Blur(1.0)
MT_Merge(Minblur(),Mask,Luma=True)
### Deblock ###
vsDeblockPP7()
### Overall Temporal Denoise ###
ConvertToYUV444.ConvertBits(32)
Anime4KCPP(ACNet=True,HDN=True,HDNLevel=2)
ConvertToYUV420.ConvertBits(16)
### Resize ###
NNEDI3_RPow2(2,CShift="Spline36Resize",FWidth=960,FHeight=720)
aWarpSharp2(Depth=5)
Sharpen(0.2)
### Darken-Thin Lines ###
FastLineDarkenPlus(Strength=24,Prot=6)
aWarpSharp2(Blur=4,Type=1,Depth=8,Chroma=2)
### Deband ###
Neo_F3KDB(Y=100,Cb=100,Cr=100,GrainY=0,GrainC=0)

Given the source, I find the results surprisingly OK but was hoping for some help making the final output slightly sharper (it looks a bit too blurry to my eyes). I fiddled about with the ### Darken-Thin Lines ### section of the script, trying various settings, but I couldn't find a better combination. I'd certainly be open to a different line sharpener-darkener, and would appreciate any other suggestions for improvement, too. Thanks. Here's a test clip.