As Pez put on his lil bit.....to the slippery slope. Hope you have an understanding bank manager, or have won the lottery!!!
Also agree with Pez on this too, but dod take your time and use the right size spanner/allen key, after all it is this stuff that keeps you alive whilst enjoying the underwater life.
Have fun, safe diving.
Gary
aka Scubanut
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Did I mention that we have been to the Galapagos?
Yup we really did, took bloody ages too, but was worth it......................just