I don't have any real experience with kydex sheaths but I'm considering trying one out as they seem to be much more quickly available than leather and I don't want my 511 to get cold waiting months for a set of pants. I'm hoping some of you guys that use/love kydex can answer a few questions for me.

1) what are the differences between a taco style and pancake style? Any functional difference at all?

2) How exactly does a tek-lok work? can they be used to carry horizontally? If not, is there another way to attach a kydex sheath to a belt that allows for horizontal carry?

3) is it any more or less bad for a blade to leave it housed in a kydex sheath for a long period than a leather one?

Thanks ahead of time for taking a look and any insight you can provide!