Good job discovering that extra pixel left by basher with Tricky 6.
I guess normally that pixel gets taken out immediately by subsequent frames of the bash stroke, so it's not noticeable unless you specifically stop the basher on that frame. And even then, it also has to have bashed far enough into wall, which often tends not to be the case when you're trying to set up sliding against a wall.
Unfortunately I have no chance of contributing to this effort in any way nowadays (probably not even updating any emulator scripts like I might've mentioned on past postings) from lack of time, but will be cheering you on as you progress through the levels.