Seen here, bottom of the page
Only took them 5 years after I gave them the original drawings to do it wrong, twice :)
This was in answer to the new Petzl hammer question from another forum.
"I have cut down the larger, current production, Petzl Nomic hammer, which is virtually what Petzl is doing for the LWT version from what I can tell by the drawings. The CT hammer isn't much of a hammer for pounding on things. The newest Petzl one even worse I suspect from my earlier efforts last year with the Petzl hammer. The bigger production hammer makes the Nomic unbalanced imo which is why there is a CT hammer. The Petzl LWT version will solve the balance problem but not be much of a hammer. For many a little "head protection" is all that will be required.
If that is all you require yes, the newest LWT Petzl "hammer" or cutting down the bigger Petzl production hammer will solve your problem I suspect.
But to be clear, the profile of the Petzl LWT version and Cold Thistle version are not similar in head coverage, head protection or hammer profile. Let alone their respective abilities as actual hammers.
What Petzl's hammers (any version) won't do is make it easy to change picks in the field.....ask those that have tried. Serious design flaw imo."
I'm out of CT hammers until or if I decide to build more. That will depend on the future demand.