help My Predator Z shaft can't fit to my viking butt!!!

i bought a predator z shaft overseas on my holiday trip, and i told the seller that i'll be using it on viking butt, he say it's ok cause predator make some different joints for the z shaft, he then give me ths z shaft with a small written "v" on the joint. I thought it was ok, but whne i get back home , i try to put it on my viking but, it only screw halfway!!!
i don't know if it would fit if i forcefully screw it all the way in, but my original viking shaft is very easy to screw in, the predator one is very hard, like it doesn't mean to be ft on the viking.
On closer inspections, i noticed that the screw on the Z shaft is full while on the viking shaft is only half. i mean the viking is half screw, half plain , a bit looks like uni loc joints.

is all the predator shaft for viking joints are made like this >???
should i return the shaft or just try to forcefully screw it on the viking butt?

how many viking joint is available there ?
i thought is only one kind right??? If i'm not mistaken, mine is implex to implex viking with quickrelease.

help needed badly, thax.

[ra[g]e]

I think you may have been played by that cue dealer overseas. You may wanna order a Viking Quick release Z shaft from Seyberts!

[mechmat]

Viking actually has 6 joints, but it looks like all but 2 should be interchangable.

http://www.vikingcue.com/pages/cues/joints.html

It sounds like he gave you a 5/16x18 fully threaded shaft rather than the Viking quick release. This might be what Viking used before they started using quick release, but I can't say for sure.

If you can get your money back, do it and order the right joint from seyberts.

[Neil Fujiwara]

The only difference between a 5/16x18 and the Viking quick release is that you have to take a 19/64th's drill bit to widen the threads on the insert. Any person with a lathe should be able to do this pretty quickly. If you have a steady hand and equally steady nerves you can try it with a hand drill, but it is not recommended since you could drill off to one side causing your shaft not to mount straight.