All credit for the inspiration to do MP 2126 and 2020 goes to Donovan Furin, whose Mopac GP38 pair absolutely blew my mind.

Links to Donovan's models:

http://mopac1.tripod.com/MP2005Left.jpg
http://mopac1.tripod.com/MP2005Right2.jpg
http://mopac1.tripod.com/MP2007left.jpg
http://mopac1.tripod.com/MP2007right.jpg

As you can see in the photos, he has modeled two units with two totally different histories.