לגו סט 42139 – בנייה אלטרנטיבית

I must have constructed more than 40 technic models from Titanic downwards in size and with different degrees of complexity. All with complete satisfaction!, until 42139! using both printed instructions and Web based material and with support from other modellers I can only suggest that a complete review òf the model or its build sequence is adopted or that it should not deter less experienced models spend their money.