The Minor Blues Scale: 1,b3,4,b5,5,b7
The Major Blues Scale: 1,2,b3,3,5,6
Combination of both works out as: 1,2,b3,3,4,b5,5,6,b7
Which is a lot of notes, 9 in fact.
I love the sound of the Major Blues Scale and some of the Add 3 variation I mention above sound amazing, so I get the idea that blurring those two scales might sound awesome but for me, it just doesn't sound how I expected it to.
I've re-posted this as a left handed version because the other version gets quite a few hits, so it is something of interest to people. For me, I far prefer MINOR BLUES add 3 or MINOR PENTATONIC add 3.
It was an interesting exercise, but not something I find very useful.
I've mapped them out as 3 NPS, 4 NPS and as standard Minor Blues shapes with extra notes added so they might feel more familiar, but they still feel really awkward under the fingers to me.
I've included all version below.