Yzer, I'm trying to get to that link, but it keeps taking me to this same page

I'd like to gander to make sure I'm not overdriving the telescoping part when I'm running in 18650 mode....
Thx
The link works for me. Using the link on Firefox (and most browsers) will open the post in a new tab.
It's post #3480 back on 9-15-2014.
Here is a cut & paste.
Sigelei Zmax V3 & V5 telescopic battery tube adjustment
Flat top or button top battery: doesn't matter with these instructions.
-For 18350 battery. Using the tall or short battery caps screw down the telescopic tube to the shortest length. Screw down the battery cap all the way. If the spring in a long battery cap has compressed it may not fit 18350 well. The short battery cap is a better fit with 18350.
-For 2x18350: Use the tall battery cap. The short cap will leave tube threads exposed with 2x18350
-For 18490, 18500 and 18650 batteries using the tall (15mm) battery cap. Place the battery into position in the tube and adjust the tube length until only 1/16" to 1/8" of the battery extends past the end of the tube. Tighten the tall cap all of the way down.
-For 18490, 18500 and 18650 batteries with the short (10mm) battery cap. Place the battery into position in the tube and adjust the tube length so that the base of the battery is 1/8" to 3/16" below the end of the tube. Tighten the cap all of the way down.
Keep in mind that the battery springs found in both the tall battery cap and the short battery cap are the same size. They are identical springs. For all batteries longer than 18350 the goal is compress the spring about 1/2 of its relaxed length regardless of the cap size. The short cap will give you the shortest overall length for the Sigelei with a 18350 battery inside. For 18490, 18500 and 18650 batteries the overall length of the Sigelei for each battery size will be the exactly the same when using either the tall or short battery caps so long as the spring is 1/2 compressed. The only advantage to using one cap or another at sizes above 18350 is the tall cap will be much easier to screw on than the short cap.
Typical lengths I get on Sigelei V3 Telescopic with different batteries. Just an estimate depending on how tight I compress the spring.
18350: 100mm with short battery cap, 105mm with long cap.
18490: 111-114mm with either battery cap, spring 1/2 compressed.
18500: 112-115mm with either battery cap, spring 1/2 compressed.
18650: 127-130mm with either battery cap, spring 1/2 compressed.
2x18350: 132-135mm with the long battery cap, spring 1/2 compressed.