Would I have to undue Vmod 1 to do Vmod 3?
If so, and to clarify, is there anyway to leave Vmod 1 in place and add a different sized resistor at the R52 location or other location for example to get Vmod 3 results?
To my knowledge you would
have to remove VMOD1 completely before performing VMOD3. If you try running both at the same, if it works or not, please report here your results so we have another testimonial to go by.
Regarding your second question, if you find out how, let me know and I will add to guide.