So you've extended it as far as it can go? er...I don't have one of the vimax/jes [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]extenders[/words], but I think they have knobs right that you twist for tension? I guess that's what I'm asking is if you twist the knobs all the way so that it is completely extended? I don't think the actual number of rods you are using has as much to do with the length "capacity" of the [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]extender[/words] as the tension you use while extended does anyway.
As far as the coldness is concerned I'd say just make sure you either keep heat on the area during or immediately after use. Do you wear yours for 2 straight hours? That's incredible for someone that hasn't been using an [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]extender[/words] for very long much less Penis Enlargement in general. Bravo, man. I can wear mine for an hour, but not completely extended. I don't think you have anything to worry about as far as damaging the penis head nerves or anything like that if you monitor for numbness and hurtful tingling.