Hi, I got my first double bass today and have a question, hoping you guys can help me out. I have played the bass guitar for about two years, recently using a Fender Jaco fretless bass. I find it's really difficult for a newbie like me to get the right left hand position on a double bass. So, should I add some fret marks to the fingerboard to help myself get used to? Or is it a bad habit to add these auxiliary marks?