Helical vs straight clamp

[acollins]

Is it necessary to fletch my arrows with a helical or will a straight clamp with an offset work just as good. I ask because I have tried fletching a couple of GT 3555 trads. The straight clamp ones look great but I am having trouble getting the left helical to make good contact with the arrow. I have tried several times and different adjustment just can seem to get it to satisfy me.

[Terry Green]

Offset is fine

[acollins]

Great I figured but thought I would check.