I have said severl times on this site that jetboil were not even trying to make a light stove. In fact we now mostly use a Caldera Cone.
However we, 2 of us, are going, for 15 walking days, to the Pyrenees by train with only one resupply possibility. This resupply is on day nine where we were not sure if meths was available and almost certainly English type screw on canisters were not. I do have an adaptor to use pierceable European canisters but it weighs 110gram.
It seemed to me that the jetboil with a 450 gram canister brought all the way from home would be the lightest option.
So I have done what I said should be done and lightened my jetboil. It now weighs 292 grams. It still has piezo ingnition. It still locks on. It still has a neoprene sleeve.
This is what I did:
I cut down the pot to 3/4 size, saving 33 gram, this is still bigger volume than the MSR kettle that we would use with alcohol. I cut down the neoprene sleeve to suit, saving 7 gram
I filed off most of a flange on the valve saving 2 gram
I cut away large parts of the steel base plate saving 18 gram on a 42 gram component. I have not changed the ventilation to the burner in doing this.
I cut away large parts of the black plastic moulding underneath, but leaving enough to keep the piezo in place and stabilize the steel base plate. I do not know how much I saved as I had already cut some of the moulding away before. What is left weighs 27 gram. and I saved another 7 grams over what I had already done.
I put aside the lid, 30 gram and cup/heat exchange cover, about 30 gram and made a new lid from foil, 6 gram.
On my calculation comparing with a piezo standard cylinder stove and MSR titanium kettle and a windshield at about 250 gram the break point where my lighter jet boil is initially lighter is 22 pints boiled before resupply, using Will Rietveld's consumption figures. In our case that is about 4 days.
Or to redo scenario 1 in Will's stove analysis as soon as a standard canister stove needs a second canister without resupply it is likely to be a heavier option.
The alcohol comparison for 4 pints per day puts the break point with an ordinary jetboil at about day 10 40 pints. The lightened jetboil is about 110 grams lighter which equates to a break point about 11 pint less about day 7. We tend to use more like 5 pints boiled per day so Even if we could be sure that meths was available at the resupply village it would not be the lightest option.