Hello, while I was attempting to install Windows 7 on my rMBP, I encountered the "No bootable device-insert boot disk and press any key" error. I held the command button and rebooted to Mac OS. Then, under disk utility, I removed the bootcamp partition and reinstalled windows. During this time, Bootcamp asked me to choose the size of the Windows and Mac OS partition, it seems to be that I lost 50MB. Is there any way to claim back the lost disk space? Thanks.