Nothing is set in stone of course, but I've just been looking at Steve's preparation page on his website. For the projected 87,000mile target, he's got a rough average of 213 per day for March [up from 188 in February] and for the 82,000 total, a projected 200 [up from 180 in Feb]. That's quite an increase in average compared to the jump from Feb to January, which hasn't seemed much at all. And from here on in, the racket tightens even further, by about 20 miles every month. All days are significant, and he's doing great guns at the moment, but March does have that kind of "here we go, up a level" kind of feel about it.
Wishing you well and stay safe TG