your timig is improving, but where i kept hearing slipups were at the "chord changes" or "phrases" like till said...keep practicing the line and you'll do much better...what i was hearing in your playing was what sounded like a "lack of confidence" or a second guessing of your playing...if you keep practicing those lines, you will gain confidence, and you will be the next duck dunn

also, you are a fan of the blues, and thats good for you. pro blues bassists are in general really are able to lock in, so listen to some of the classics, like Clapton, King, King and King

(that is BB, Albert and freddie) and really listen and try to find the groove, where the bass and drum really lock up perfectly, and try to get that with your playing with your drum machine and metronome