The book was a great refresher however the book was on back order and I did not recieve it in time for my real time tune up in the pool. However it will be a great refresher for future dives.
MRS (Mechanical Release System) Plus Weight Integration – XSmall through Medium (10 lbs diver releasable trim weights for improved weight distribution and balance) Large – XLarge (13 lbs diver releasable trim weights)