To give you some idea of the size of my scratch build here it is next to the official Ninja on the left, and next to my Pan European Mark 3 with the tower cut down the on the right.
And here is my model next to a SJG Mark 2 Ogre. The Mark 2 is a lovely little model in its own right, but I don't feel it has enough of what I would call the Combine look about it. It looks to me to be something the Pan Europeans would do with the Mark 1 templates to produce their own Ogre variant, but I recognise that is just my opinion on this matter.
Finally, here is my model showing some work I've done on my long dormant custom Ogre project, which started off as a Ninja, but after the official one came out my model went on the back burner. Now it will represent a Mark 2S, based on Henry Cobb's stats. I've cleaned up a couple of areas that needed to be tidied up, and I have added some panels to give the model some extra detail. This is pretty much close to finished, though I've not represented the anti-personnel batteries. I'm just not sure how to do them.