Seems like there is a shortage of the Delta inverters 3 phase, so the spindle manufacturer offered me the 7.5kw version for 310usd, so more than satisfied. another 50usd for the canopen module, hoping I can make it work with the controller.
all in all, including shipping and a few extra tool holders and collets i can stay in the 2500usd range, more than reasonable. I still have the current spindle as a backup (already some strange noises come out of the bearings), but cannot afford to have the router idle for long.
As neither the manufacturer nor other people here ha supportive ideas for the Servo Drive+Spindle, I am not ready to risk the frying
. 300usd far too little for the risk.
also, need to mention, is the peace of mind that I choose the option that sounds more reasonable at this point in time. So thanks a lot for the help