scubapro g250 & g200

[OzSeano]

so i posted a reply with pics but i think they were too big and they havnt made it up . i'll check that out tomorrow

 

[Tbar]

Have a look here for manuals and schematics. There is not an MK10 but it may have similar characteristics to the MK20.

http://www.frogkick.dk/manuals/scubapro/Manuals/

These seats may be okay for the MK10. Scubapro Cave Cone HP Seats "SIX Pack" NEW Fits MK1 MK5 MK7 MK8 MK9 M10 | eBay

I use these seats in an s600 they are probably okay also in the G250. Scuba Regulator LOW Pressure LP Seat Part Second Stage Dive Rivet Style A148 | eBay

There is a thread that gives the standard o-ring sizes for the Scubapro part numbers

Edit:
Re the computer:
Suunto Companion
They say "You should also be aware that, should a battery on one of these older Companion models become totally drained, the computer cannot be repaired."

Edit 2:
o-ring thread - its very long there are some posts with attached spreadsheets with lists of parts/o-rings and schematic PDFs.
http://www.scubaboard.com/forums/repairing-your-own-gear/322518-scubapro-o-ring-sizes.html
MK10 schematic http://www.scubaboard.com/forums/re...2518-scubapro-o-ring-sizes-4.html#post5050612
This is a good reference http://www.scubaboard.com/forums/re...2518-scubapro-o-ring-sizes-2.html#post5031990