Using bladder tanks in the biges for extra fuel capacity ?

[Pinnacle]

the new engines will suffer

 

[Bajansailor]

Further to my previous post #72, re the bladder tanks on Dirona, I know that they are off-topic somewhat (as they are stowed in the cockpit rather than in the bilges), but I thought that the experiences of the Dirona crew in using them might be useful.
Here is a link to the article I was trying to find then about using them :
http://mvdirona.com/2012/12/fuel-for-the-crossing/