How to securely clamp ZT 0452 on KME?

[sharp_edge]

I have recently switched to KME sharpener and enjoyed sharpening all knives with it, except ZT 0452. I mean I can clamp tightly other knives even though they do not have parallel flats (like Spyderco PM2) but am having a hard time with ZT 0452. Anyone has ever used KME on ZT 0452? If so, how do you manage to clamp the blade without any wiggling?