others some pneumatic power and others mechanical power all are provided by the control power source 11 a chassis connection 12 is in predetermined communication intermediate the chassis attachment base 6 on the digger body 1 and the track laying chassis 7 in addition to providing standard mechanical and hydraulic linkage predeterminedly from the prime mover 10 to the first track 8 to the second track 9 and to other operational components on the track laying chassis 7 the chassis connection 12 also provides novel verticality pivot of the digger body 1 on a pivot axis that is collinear to linear axes of the track laying chassis 7 the first track 8 and the second track 9 this allows control of verticality of a digger head 22 that is orthogonal to the digger body 1 the control power source 11 has control power communication with a control power distributor 13 that is positioned on the digger body 1 the chassis connection 12 includes track directional communication of control of mobility of the first track 8 and the second tract 9 with a mobility controller in communication with the control power distributor 13 the chassis connection 12 includes body orientational control of orientation that includes at least verticality of the digger body 1 in relationship to orientation of the track laying chassis 7 with an orientation controller in communication with the control power distributor 13 an earth mover blade 16 is manipulatable on blade control beams 17 projected from a blade attachment portion of the track laying chassis 7 the earth mover blade 16 has a predetermined plurality of directional orientations controlled by a blade controller in communication with the control power distributor 13 a digger boom 19 is pivotal vertically from a.