Some of you were asking about my plastic Germans, built using Tamiya bodies, Bolt action arms & equipment, GW Empire heads, and a pressmolded stahlhelm (Though I think you could use the Tamiya stahlhelms as they were almost exactly the same size).
Overall, I have about 1/3rd done this way, 1/3rd converted Copplestone (example on the first page), and 1/3rd from various other sources and conversions. The rifles on the Copplestone figures are chunkier (I recently went back and filed the converted Copplestone rifles all down to thin them a bit more once I realized I was going to mix the two), but are at least the same length as the Bolt Action Rifles. I can live with that as being close enough (I briefly thought about converting them all to the Bolt Action rifles, but the metal figures almost all have close-molded arms, which would be a nightmare to remove).
Otherwise they mix quite well, with there being less than a head's height of difference between my tallest and shortest landsers.
If you're really interested, I can post the lot once the conversions are all done (two figures waiting on parts, one of which is my Oberst). The final painted versions will go up in my Pulp thread.