Check my mafffffs...

[Woz]

Right. I am pinching twin 12's full of 18/40 cos a chum of mine is buying a twinset and he won't use it. So...

1. Decant 80 bar off the twinset into another identical empty set.
2. Add 20 bar of O2 to the 150 bar left to make 170bar of 27/35
3. Top off with air to 230 bar. I reckon that's 25/26

4. Take the other twinset with 80 bar of 18/40
5. Add 34 bar of O2 to get 114 bar of 43/27
6. Top off with air to 230 bar. I reckon that's 32/14

My brain hurts and I now have a migrane.

[Gary K]

bloody gas pikey!

[Woz]

Not pikey but "brilliant garage blending" with some welding O2 and the club compressor.

[HP]

Sounds about right. I know what you're doing but 25/25 is much more useful for everything really. If you get blown out from one thing and have to hold it over for another dive - 25/25 covers anything in the 30ish down to 45m very nicely IMO

[Woz]

It's for my triox course with Ian Dennis. Apparently the IANTD tales are 25/25 and 32/15.

Handy, eh?

Except I've only got 174 bar of O2 in the 47 litre J. Arse. I need 180.

[HP]

I guessed - they're actually 28/25 and 32/15 - you might be better off cutting some of your own for 25/25 with something like Decoplanner. I'm sure Ian will run through all the options mate

[Woz]

I'm sure he will. It looks like I can get what I want with the O2 I have by only filling to 220 bar. Marvellous.

Decoplanner? Just poke it into the VR3 and Bob's your uncle. I did actually have an Uncle Robert. Miserable bastard he was.

Cock. You're right. 28/25 and 32/15. *sigh* best get the calculator out. Again.

[Woz]

Right:

135 bar of 18/40
25 bar of O2 to 160 of 30/33 leaving me with 161 bar in the J
Air top to 220 makes a beautiful 28/25

95 bar of 18/40
35 bar of O2 to 130 of 40/28 leaving me with 143 bar in the J
Air top to 240 makes a beautiful 32/15

Anyone fancy a "garage blending course"

[Woz]

Cock. I need to bring some 25/25. Back to the drawing board...

[Gary K]

except of course your starting with 240