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Thanks for all the comments - all considered and digested! "Gourmet Gold" 85g Cat food matches the dimensions above and seems flimsy enough to hole punch. I bought a few so will try a few different hole configurations.

Yeah, but I'd have to drill steel 'cos it would knacker the GF's holepunch! Was hoping to avoid that. Work of art!

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I'm going to have a go at a supercat stove. I'd like to stick as close as possible to the Jim Wood design with a Fancy Feast Aluminium Can. (http://jwbasecamp.com/Articles/SuperCat2/) Rightly or wrongly I *would* like to stick to Aluminium. So what's the nearest equivalent aluminum UK cat...

I'm vaguely looking for a roomy 3 season sleeping bag. Anyone got a view on the Mountain Warehouse Summit 300xl or suggest something better? http://www.mountainwarehouse.com/camping/sleeping-bags/3-4-season-sleeping-bags/summit-300xl-sleeping-bag-p11491.aspx Gotta be cheap and not...

Google came to the rescue. The gas pressure is indeed a constant determined by the saturated vapour pressure. However the fluid itself has a fairly high high co-efficient of expansion (0.002 - 0.003 depending on the gas) which needs room to expand.

Thanks. I may be misunderstanding but it seems to me that even if you filled a cannister full of liquid with no gap at all the pressure in the canister would still be the "saturated vapour pressure" of the gas and no more. ie The pressure in the canister is always the "saturated vapour...

Absolutely fantastic. Many thanks, ordered one. No more half empty cartridges lying around & I don't think I'll be using meths again.

Can you explain what you mean by overfilling - it's not clear to me how you could overfill a 100g EN417 butane/propane lindel cartridge from a 500g EN417 butane/propane lindel cartridge. I might have a misunderstanding. Also can you point me to a link to the adaptor you use to fill the 100g...

Aparently Butane is liquid at half the pressure of 30/70 Propane/Butane. (http://www.engineeringtoolbox.com/propane-butane-mix-d_1043.html) The Coleman cannisters are filled with 70/30 butane/propane mix. I'm not sure what that means in terms of the pressure the Coleman canisters are stored...

I tried it today and to my astonishment you *can* transfer Butane from a lighter fluid bottle into a Coleman style canister. The lighter fluid can nozzle fits snugly in the canister. I used scales to check all the Butane had gone in. Apparently Butane is stored at lower pressure than other...

Leaving aside the issue of whether of not it's wise, does this technically work: www.youtube.com/watch?v=LalFZRiZNGs I'd have thought that some kind of adapter would be required.

Thanks a lot. On reflection, friction pulling the opening closed is actually quite a big part of my problem.

Thanks Dave and Mike, I feel a bit bashful that I didn't think of that. That's a frighteningly good idea. I carried an umberella all day on Sunday on a long walk when it rained all day and it deffo saved me a soaking. I'd guess a golf brolly can be a pole for a tarp and on a light wind night...

I have a British Army Bivvy bag with drawstring and a mummy sleeping bag. My 'usual' mode of use is to sleep with no tarp so I get 360 view, which is nice. :D My problem is I'm not a contortionist so once I'm fully zipped in the sleeping bag with the sleeping bag hood drawstring closed I...