If possible rig two rods, one with a real heavy tip and one with medium or floating tip. You'd be surprised at how many fish you can catch in the winter on a floating line. If you have noticed, the mean/ave flow during the winter has been much lower. I rarely use my t-14 tips anymore unless I'm fishing High water. I like unweighted flies personally.

I like the Mow tips a lot! You can really dial it in quick.

Ideally you want the fly at least 12 inches of bottom. I used to use very heavy tips but I have caught more fish using lighter tips.

You need to get your rod out in front of the fly in the winter, opposite of summer/fall.

Most people cast off their upstream shoulder and cast down and across all the time....

I always cast tips in winter off my downstream shoulder so I can cast across or a little upstream to give the fly time to sink. Make a mend or two then get in front of the fly and drop a lil line if need be.

Don't mend, mend, mend, mend!!!!