Yet another day with no issues. Currently rebuild is scheduled for 30 days from now. As I am already upgrading the gpu I will take this time to do some other minor repairs and updates to the sb2.

As a result the SB2.1 project will be completed this summer:
Repair 2 broken 120mm fans.
Create buffers for front 4 120mm fans to improve cooling performance of radiator #1.
New GPU
6GB ram
64bit OS
24pin custom tower link connector, this will make tower merging and splitting easier.
Updated cabling, finalize interior cable routing.
Additional 120mm exhaust fan above PSU.
Fan guards for 80mm fans.
Improved noise cancellation.
Ported lower exhaust vents for cooling tower.
4 air zone temp sensors in cooling tower.
Possibly a 3TB HDD or an upgraded SSD.