As I said...previous in this thread. If you have problems fittng a boot/crampons combination, a pair of BD heel pieces and a set of Petzl front bails will often solve the problem on any of the Grivel, BD or Petzl crampons.
Back to the OP's question one more time?
"My wife has Raichle's (don't know the type) (EU 38).
I have LS Batura 2.0's (EU size 45) and LS Nepal Trek EVO's (EU 45,5)."
This may help in the size 38s..may be not as the info is with La Spotiva size 38s.
http://coldthistle.blogspot.com/2012/03 ... -from.htmlThe 45.5 Batura should be easy with any Petzl crampon.
"will the heel-lock keep our shoes in place? Even in tough terrain?"
All the flip lever heel pieces are the same on Petzl crampons. One size "fits" all. 47 to 37. Obviously ti isn't going to fit all of them perfectly. The more common the boot size *men's 43" for example the more likely the fit will be decent. But the heel levers and side guide wires will keep the crampons in place. Don't forget you have several holes on both the heel piece and the toe piece to adjust the bail and heel lever for better positioning and a better fit.
I don't have my Batura 2.0s here right now or I'd look closer. I posted a picture previous of Lynx/Ultra combo being held on with just the friction of the front bail and the rear heel posts. A perfect fit in the crampon world. Damien posted a picture of his Spaniks above. The Spanik has an abnormal amount of rocker in th toe and heel to help make it walk easier. Makes fitting crampons harder though. I have actually ground the sides of several pairs of Spantik soles down to make them small enough to get inside the heel guide posts of BD and Petzl crampons. Done the same on my Scarpa Ultras as well for the Petzls. Same guide posts that might be too wide for another boot are too narrow on these for the fit I want. The guide posts on a Petzl crampon don't fit like a pair of Grivels for example. The version is a
side guide, where the Grivel is a
end piece. Both work, and BD seems to be some where in between on my 45s. But no question it is a different design philosophy and seemingly differing priorities by the three major brands.
If you look closely at the right boot and crampon pictured above you can see the rear of the boot actually over laps and sticks ou tthe back of the crampon. It was intentional to get the best crampon fit possible which left the inch + of rocker in the sole ignored on the fit.