My Type XXI hydraulic retracts plains nice
http://s82.photobucket.com/albums/j2...DSCF0001-2.flv
The lateral retraction is very cool
http://s82.photobucket.com/albums/j2...DSCF0001-1.mp4
The only sub I over sized the dive plains is the SB-2 and it is not a scale anything and I would never do it to a scale sub though several could have used it!
Dave