Very cool build, especially the ground base and the troop figure aiming the MG's!
Some parts of track were lack of heavy mud, above the interleaved wheels (could be clearly observed from picture 21 & 22), but I believe that you were able to fix that soon as well-done as you applied on the lower section of the track (that directly touch onto the ground).
Also, you may add a sling for binocular held by the officer and add one more dot into his dress to represent a button above his belt buckle
Nice touch, keep on going, and happy modelling, Antal!
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Warm regards from Indonesia
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Garry