Consider disassembling the bass and making the repairs as individual parts piece by piece. When all the parts are repaired, fit them back together dry (no glue) just to make sure everything will work.
Double bass restoration is a highly skilled craft, using tools and methods that are difficult to master.
Below is a link that may give you some ideas of proper bass repair techniques.
Be sure to check out the "German Full Restoration".
http://www.stringrepair.com/Double_B...tion_Setup.htm
http://www.stringrepair.com/Double_B...estoration.htm