I too am building a B-36. Mine is 114" compared to your 112". Mine is also electric with 6 brushless motors and has retracts. If you go ahead with building one, you should know that Century Model Jets can now offer you retracts with 4 wheel bogey style main gear. I have a build thread in the RC Scale Aircraft forum that has ample photos of the retracts and also photos of my progress.
If you are still reviewing B-36 plans, you can download mine at
http://b36.flugmodel.net
This is a work in progress so I have not yet organized the plan files. At least they are available free of charge for download.
I will attach the most recent photo of where I am at with my plane.
Mike Roerig
[email protected]