WOW! You must be pumped Paul!
You need to do the swap now - you can do this! (Repeat 100 times).
Just take your time and keep chipping away. It's not as daunting as you might think. 
I have done 2 and about to do my third, so if I can do it with only 3 brain cells you sure can 
I reckon having them side by side would help heaps...
