I play 7 and 8 string guitar and I use my index and thumb for my right hand and adapted that style when I started playing bass. What are my disadvantages by using my thumb and index to pluck instead of using my index and middle finger? Am I loosing speed? I find I can do the disco octave thing much faster and cleaner using the thumb and index. I get a tighter more staccato sound and it also allows me to get into a slap position. Thanks for any comments.