These are the pieces that I have gotten from Clay. I am quite impressed. They are both for my 42, but as I understand they can be used for a 45 and I would assume the 44 and 48 also. I meant to do a review on them, but I'm a bit slow, so they'll get a quicky here and now. The pics are all with my 42 for size comparison.
Neck Sheath: One word to describe it "awesome." I love this thing. It holds the knife as tightly as I could ever hope for, and draws very smooth as long as you aren't too aggressive, just like any other neck knife. The 42 carries very nicely in it, it works great, but it prints in a t-shirt so it's not good for a concealed carry in some areas. If you can carry one open or if you wear a sweatshirt or jacket over it though, it should provide decent protection against printing. I got it just for a utility carry position, and they are legal to carry in most places around where I live, so it's not a problem. As I have stated, I love this thing, and I carry it quite often when I am off campus.
Belt Sheath: Very nice to carry. I wasn't terribly sure about this one when I got it as I am not bothered by the belt sheath provided by Benchmade. This one carries a bit tightly for my taste, but it is very secure, so I think it is a good trade off. If you don't like the sheath by Benchmade, this would be the next best alternative as far as I'm concerned. The tec-lock(sp) is a very good way to mount it to a belt, and works very well. It gives a good number of carry positions, so you can choose, although some will be preferable to others, it still allows an additional custom fit you can play with upon reciept. It allows for decent cocealment with a t-shirt or other untucked shirt also. It also appears to be completely reverseable, so left handers or double balisongers will have no trouble with it.
In conclusion, I think this is a very good set to have, and the price was unbelievably reasonable, especially after I have looked at other concealex carry systems from other custom/semi-custom makers for various knives. I am quite pleased with mine, and I would have no trouble recommending them to anyone else.
My father also purchased an Xtreme Concealex sheath from Clay for his CRKT Komodo, and was very pleased. Clay is quite reasonable and easy to work with on the sheaths, and makes a fine product.