I never liked the factory mount so in my opinion you’ve got what you need. If your even remotely mechanically inclined you can bolt it up to your sight housing and move the vendetta in tight to your riser. You may need to use a little bit of flat steel and drill some holes to make it work but it will be solid. Moving it helps with the weight distribution and torque from my experience.
When I shot a Hoyt I managed to mount it further forward then my current strother. Here’s a pic of the Hoyt, I know the quality sucks but the photos old.
On my strother it’s mounted here. Once again bolted to the sight and I could get better pics in two weeks when I’m done work but this is all I’ve got for now. It only takes a few minutes to visualise where you want it and what you need to build to make it happen.