User Review: Primus ExpressSpider
Price Paid: gift prize from Trailspace
This is seriously lightweight for a remote-canister stove. I measured it at 6.94 oz. Typical of Primus, it is well-built and finely crafted. It is a minimalist design for a isobutane stove, but is very stable and highly functional.
First, this stove's ultra stable, tri-pod base design folds flat against the burner itself, making it impressively compact for packing. I disconnect the fuel line from the brass fuel tube that passes over the burner to compress packability even more. I can then run it (the hose) along the inside bottom perimeter of my 1300 ml Titanium pot (5.8" interior diameter and 3" deep) and place a 250g canister in the middle of it.
The stuff sack is nice and thick to prevent poke through and damage to my pack. If you packed a 125g or so cannister in a pot of this size, then you could nestle the stove inside the canister's bottom and close the whole thing up tight (4.3" interior height of cookset w/ pan as lid)
For the ultimate review of this stove, go here to Trouthunter's award-winning review:
There is no piezo ignition so you need a flame source. I used a match for my cold-weather test conducted last night. It was calm, breezes less than 2mph, and 42 Deg F. Using the heat shield, I was able to bring 1 liter of cold water (40 Deg F) to a rolling boil in 6:30 using my aforementioned pot and lid. I did not turn the canister over, which was about half-full. While that time to boil is 2 minutes longer than claimed (and substantiated) by Primus, their tests were not in cold, moist weather.
The Express Burner design and precision crafting make for fantastic simmer control. I experienced no sputter or variations in output. The express burner is well know as being efficient, and I would be comfortable using this down into the twenties temperature wise.
The 6" pot was held firmly in place by the great spider, and in fact could have held a pot much larger. The total span of the spider is about 6.5" in diameter.
Others have mentioned (including Trouthunter, and very astutely) that the heat shield is not stable and splits apart at the fold seams with continued use. I counteract those problems in two ways:
First, I have ironed the shield flat so that it does not ripple and effect the stove's stability, and I store and pack it in between my Orikaso Fold-Flat Solo dinner set, thereby protecting its flat character. I will say that using the heat shield on stiff, wide blade grasses and ground cover will make it terribly difficult to stabilize the stove due to the product's low weight.
Secondly, I made a heat shield that has a center cut-out and slit so that it can be mounted off the ground but below the burner, allowing the excellent tri-pod legs to adapt to an uneven surface.
Overall, the Express Spider is a great stove for even the list price of $60. My only wishes are for an optional Piezo ignition. I may order one from Primus and install it somehow.