Is a strobe sprong...

[Dafni]

If you want to have a true, wobble-free spur, the sprong is the best option.
Worth 40? That's up to you to decide. How bad do you want it?

[ClodMaxx]

prior to having the sprong, i never really minded the spur wobble. it never caused any harm. the sprong is nice, though, but to me it's not worth $40. i do like the ability to tighten the sprong with my fingers out in the field instead of using a wrench (although it's hard on the fingers - and you have to use some pretty serious hand strength to get that sucker tightened down really well).

i think the sprong works best in applications where a metal spur is used with a metal pinion. you really don't want the mesh to move much. plastic on metal is more forgiving.

i say put the $40 towards something else - like a bunny. or a Bee Gees box set.