some earlier posts I found with basic search might help.
From memory, you don't have to remove the mirror cell.
Just loosen off the adjustment screws and remove and replace one by one.
http://www.iceinspace.com.au/forum/s...ht=springs+Dob
http://www.iceinspace.com.au/forum/s...hlight=springs
http://www.iceinspace.com.au/forum/s...hlight=springs