Originally Posted by Brawndo
Hi Fixer,
I’m very interested in your shim idea, and a bit un clear as to how it works and where it’s oriented in the tube. Would you mind explaining a bit more in detail? Maybe a pic ?
I’m glad you saw gains it makes me want to try the design.
I’ll have to get a pic on Monday. But it’s pretty simple: it’s just a thin piece of plastic that’s cut to the same length as the inside of your tube and inserted to take up some of the volume. The width of the shim determines how much room it takes up. So a 2” tube with a 1/16” shim that’s cut to full circumference makes a 1 7/8” tube. If the shim is cut to half of the inside circumference, it makes it (roughly) 1 15/16”.
So if you’re like me, and can’t pack much of a 2” tube, you won’t be able to effectively target length. But even if I could find a 1 7/8” tube, I’d pack it too tightly and wouldn’t be able to gain girth. By custom fitting the tube with shims, I’ve been able to switch to a narrower shim as I pack more and more, while still targeting length at the same time.
As a bonus, the shim doesn’t seal against the side of the tube, so it doesn’t stop the vac pressure from getting to the thin areas if you’re thinner toward the base.
So far, my results have been great. I’ve gone from a 1/8x5 shim to 1/8x 3.25 and now to 1/16x3.25, doing my best to stay in the 70-80% packed range, and gaining length in tube at the same time. To put it in more quantified terms, I’ve gone from a volume of 19.81in³ to 24in³ in just a few weeks