Hello, I recently decided to put some flatwounds on my bass to change up the tone. When I was buying them the salesman told me that I must up the size of the gauge when switching from roundwounds to flatwounds - is this true??? So if my bass is set-up for 0.105 - 0.85 - 0.65 - 0.45 gauges, what gauge of flatwounds should I get? Thanks!!!