One thing I don't like about that holster is that the belt clips are mounted so they will add as much width and bulk as possible.
I use a Comp-Tac M-Tac which has "offset" belt attachments. Some of the best IWB holsters ever made also use this technique, the Milt Sparks VersaMax II, for example.
Here's the
Comp-Tac.
Tightening up your belt as snug as possible can do a lot to pull the gun in close to your body.
Another technique to avoid printing is to hang your undershirt over the gun and tuck the excess into your pants in front of, and behind the rig. Just a light tug will get it all out of the way, and you don't have to worry about your shirt(s) getting stuck between the grip and your back, or the wind blowing your shirt up (if you give a hoot about that).
Here are a couple photos. The Comp-Tac holster allows one to tuck a shirt completely over the gun, not just "around it" due to the clips.
If you have bony hips like I do, the gun won't want to stay at 3:00, it will want to work it's way around to your spine. You have a couple options: You could find pants that have a beltloop at 3:00 (or about where you want the gun to stay) and fit the beltloop between the loops on your holster, that way the holster won't be able to move forward or back.
If you don't want to have to worry about new pants, etc., you could do what I did. It was cheap and works very well. Have a shoe repair shop stitch a length of velcro on the back of your belt for $3-5. You can then place another piece of velcro anywhere on the inside of your belt. This will keep the holster from moving rearward, and you can move the velcro piece around depending on how far forward or back you want the gun to stay.
Let me know if you have any other specific questions, or want more pictures.