For those planning to upgrade their S2's . Do you think Bitmain will provide the below parts to use the old hashing boards instead of having them sit on a shelf ?
Would be nice, if they could sell the following only:
1 Power Board;
1 set of IO Board + BB Board + SD card;
2 sets of Fans + Fans cover;
1 LCD screen;
Try thinking out of the box? Keep your S2 intact and buy two S3's

magic!
You can think like that when you have access to unlimited power. For those that would like to put as much hashing power as possible on the same outlet, especially if no PSU upgrade is required. It is best to do the upgrade and resell the old hashing boards. That way you increase your hashing power while keeping the power requirements constant.
magic lol
If you took a little more time reading the quote that I was replying too
"Do you think Bitmain will provide the below parts to use the old hashing boards instead of having them sit on a shelf ?"
The OP wanted to reuse the old hashing boards thus why not keep his S2 intact as is. Pointless to take the boards out of the original box to stick them in another.