Czech Nymphs require a flat wrap of weight, to keep the diameter of the nymph, as slim as possible. This calls for minimum thread wraps, and the inherent build-up, if you are using round wire weight wraps.

Round wire wraps cause the thread, to get trapped in-between the wire wraps. If you flatten the wire, by placing the wire on a very hard surface and running the rounded edge of a pliers along the wire, you end up with a flatten wire that will decrease the amount of thread wrap needed to secure the weighted wire.

I start my wire wrap 2/3 back on the hook shank, wrapping forward, to just behind the eye (leaving one eye width for the head wrap). I then reverse the wrap back 1/3 of the hook shank length, this is the thorax area.

~Parnelli