Yes I prefer VMware, but you need license to have more than 4 cores. Not any issues with VBox till now. Do you think that can be an issue? And this machines have to be virlualized I just cannot use it as regular clint for more reasons.

And and now another 15 WU on other VM all inconclusive :-(.
Before there was higher probability to became to valid than to bename inconclusive and invalid .
So I have to move to other projects, but I will take few samples of DSFL to see the results.