I own a 5 string cort curbow no special spacing. When i slap i need to mute the strings betn the octace. (Slapping e's means muting an a string). Is that okay? Also i seem to hit my lower part of my thumb on a b string when i slap an e string. Is that wrong tech. No extr. noise comes doing this but i dont own a loud amp so dont know what happens if i make it loud. Help.