Shell Plate Expansion and type of forming process

Hello,

I'm working on 30.00m. trawler yacht hull form design with MAXSURF. I started to design hull shell plates in WORKSHOP, but there are some doubts about this process;
1- When i checking my plates in Parts/Development window, i see there : "Max. Girth Difference from aft to fwd : 17mm"
"Max. Girth Difference from outer to inner : 5mm"
Are these values too much for expansion tolerances?

2- Which method should i use for reliable plate expansion result? ( General, Fabric, Old Developable)

Looking forward to your replies.. Thanks..

 

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