JMHO, I wouldn't use one of those units for the very same reason as you question here. The mount holes were made to bolt an oil pan to the engine/trans and not to secure the motor into the bike to cure a problem with wobbles.
Now to add to that the length of the mount bolts used with these units, it gives additional leverage so to speak to the mount bolts fastened into the holes that were meant to hold the oil pan on. If the case was designed to use this part then it's a different scenario completely but it is an add on part by an aftermarket supplier. Give the manufacturer a call and ask about the liability issue in using these units and who is responsible if the case bolt boss gets stripped or cracks the case and see what their reply is if you can decipher the double talk.
Now to add to that the length of the mount bolts used with these units, it gives additional leverage so to speak to the mount bolts fastened into the holes that were meant to hold the oil pan on. If the case was designed to use this part then it's a different scenario completely but it is an add on part by an aftermarket supplier. Give the manufacturer a call and ask about the liability issue in using these units and who is responsible if the case bolt boss gets stripped or cracks the case and see what their reply is if you can decipher the double talk.