rail grinder on Middleboro line?

i took a train out of Lakeville on Wednesday and i looked at the track and it looked like the rail grinder that caome East on the B&A last week, did the track on the Middleboro Line. Did it do any other lines? NEC?

It was being stored in 2 Yard @ Readville Wednesday night, but not sure where it went next. They did the Needham & Franklin Branches last year so perhaps it went back to the B&A.

Rail Grinber RG315 arrived at Walpole last Wednesday. Worked the Franklin Branch Thursday night, the Stoughton, Needham and Dorchester Branches Friday night, and the Old Colony on Saturday, Sunday and Tuesday nights. Spent Wednesday in 2 Yard at Readville, and left for Buffalo on Thursday, 2/23, via Walpole and Framingham.

DAW

Must have followed RE-2 out Thursday night.