Some DF95s suffer hull cracking at the keel box. This video shows how to repair it:

https://www.youtube.com/watch?v=KA2VUBdiAxg

Both 65s and 95s suffer worn rudder bearings after a while. A popular solution is to insert a rudder tube:

https://www.rcgroups.com/forums/showthread.php?2437398-Dragon-Flite-95/page56  

You can buy the brass tube from Hobbytech:   

https://wanderers.rsawa.asn.au/index.php?page=club-suppliers