Issue: Update nRF51 SDK (8.0 to 10.0)

mbed seems to ship with Nordic's nRF51 SDK at version 8.0 included. I generally don't mind to so much that mbed relies on that older version of the SDK. I however would like to be able to test out the new experimental features Nordic is currently building in the latest SDK v.10.0.

Is there a good way to have two SDK versions co existing or can I patch the new version in myself?