Alien ancestry

Ok, so... i know it's been discussed.... SO many times, but I would like your 5 cents on my thoughts.. Looking at the engineer, he is in a biomechanial suit. Now, it's structure has some resemblence to the biomechanial nature of the Alien. Next i cuddles.. It's hyper aggressive (Can we safely agree on?) and maybe so a bioweapon created by the engineers. The snake... Strong resemblance to the egg (Has also been discussed).. The dome on the Alien, has originally eyes.. So i wonder.. Is the Alien the product of a mixture of David, an engineer and the bioweapon? Combining those three would make for a weird creature, a true bastard and a perfect weapon.. Traits: Strong and intelligent like an engineer Aggressive and deadly as cuddles Has a biomechanial structure with traits from David And a life cycle based on the snake.. So in conclusion, the Alien is "man" made.. What you think?