D-Rex Crampons and setup

Has anyone been using these?
Which boot s have you tried them with?
Ive tried to set them up for a few boots with mixed results

The Garmont Masterlites work the best with only having to move the climbing wire spacer to the very back.With the Dynafit TLT5 you have to cut knobs off the bottom of the boot to get them work.
The issue seems to be that if you want your heal to rest on the climbing wire mount, then the spacer on the crampon has to be in a different location otherwise it hist on the knobs on the tread on the bottom of the boot.

Can other let me know their findings?
Ill load some pics later today