In reply to coolbert:
"Is the rear section of all air tech crampons identical?"
No, some are light alloy (Air-Tech light) and some are Chromolly Steel (Air-Tech).
That said the shape and design appear the same and the Air-Tech newmatic
http://www.grivel.com/products/ice/crampons/27-air_tech
rear heel bail can be removed, adjusted and replaced if required with the heel clip type
https://www.needlesports.com/535/products/grivel-replacement-heel-clips-pai...
But you would have to drill/cut the plastic bail off the "New-classic" Grivel Air Tech Light to do this.