For those who have the Sainsmart Mega shield and cannot get the SD card working, I came across a website which shows the modification that is needed to get it working.
It requires a steady hand and some surgery on the board
I can confirm that it does work.
I have a bad DS1307 board, waiting for it to be delivered. I have a bug in the time code I need to work out. I do have my temp probes working now