I’ve just completed the 42131 - CAT D11 Bulldozer and cannot get it to calibrate. When I try to calibrate it the 1st movement is the ladder and it won’t stop turning. Instructions say blade should be 1st movement. I broke it all down and checked the transmission assembly, every thing is correct. Reassembled it and the problem persists. Tripled checked the plugs and everything is correct. Has anybody had this problem? What was your remedy?