From Courtyard Marriott

Turn right coming out of the hotel parking lot
Turn left at the light at the bottom of the hill onto 101A bypass
In about a 1/2 mile, turn right (West) onto 101A
Go about 6 miles and then turn left onto 101 West toward Peterborough/Keene (if you see a Shaws, you missed the exit)
At the first exit on 101 (1 mile) take Rt 13 (Milford/Brookline)
At the bottom of the ramp, turn left (South) onto Route 13 towards Brookline
After a 1/4 mile, turn left onto Emerson (first traffic light)
Take next left into Datron Dynamics