GRBL Mach3 10V Spindle Dilemma, Two Solutions for my brushless 3018 CNC upgrade. MKS DLC 2.0

I can up with two solutions to control my mach3 style 10V brushless controller via GRBL. The first solution is to use a 5V to 10V upconverter. The second solution is to use the 12V spindle out with two resistors creating a voltage divider. The resistors I used were 1K ohm on the positive side and 4.7K ohm on the negative side.https://www.amazon.com/gp/product/B081W4NTML/ref=as_li_tl?ie=UTF8&tag=fintechcomm0f-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B081W4NTML&linkId=6c064076b27aed36ec257cc67b5b648a