I have been enjoying the fine work of the 4.1.8 Shuttles and the included Ultra RMS and OBSS. I have read through many of the manuals, but I cannot seem to find the procedure for grappling the OBSS. I am currently running the STS-127 launch scenario. I am in orbit. The cargo bay doors are opened. The radiators are deployed. The SRMS is deployed to the pre-grapple position per the STS-114 PDRS, but I do not know how to uncradle the OBSS. I read somewhere where someone said you choose the Ultra-MPM and press left shift + num pad 2, but it does not move for me. Can someone assist in advising how to perform the grapple procedure, or point me to a manual with the procedure. Many thanks.