Hi,
I don’t know anything about Holtzforma but generally, history says that it’s not a good idea to buy these chinese clones/copies. Bad quality and zero service places to start with.
On Skogsforum we discuss these copies that tends to come to Sweden’s online market places each summer.
You can use Google Translate and browse here for example: https://skogsforum.se/viewtopic.php?f=12&t=6912