Hello Gryphin and Welcome on board. Indeed I can confirm from other sources that early versions of this engine did used to shake a bit, there was a suggestion of mounting an aluminium plate behind the engine mount and against the bulk head to minimise the mounting bolts biting in, although this could be done with a rubber mount.
Probably best place to check for info (if you haven't done so already) is on the official RCV website :
http://www.rcvengines.com/
Click on the Model engines link and then on the model homepage link, you will find plenty of links and user info as well as a downloadable operating manual.
Regards..........Mark.