PRINT if starting a new 4m mask use the new DIRECT_6958_4m_09Aug11.dat file 
! L1=L2=4m, A1=20, A2=8  SANS/LARGE
MASK/CLEAR
MASK/CLEAR/TIME
L/WAV 1.75 16.5 0.05/LOG
! strong scatter
!L/Q .004 1. .08/LOG
PRINT some WIDE Q bins for weak signals
! weak scatter
L/Q 0.004, 0.001, 0.01, -0.15, 1.0
L/QXY 0 0.025 .005/lin
! note increase lower time limit here
BACK/MON/TIMES 85000 98000
DET/REAR
GRAVITY/ON
mask h0
mask h190>h191
mask v0
mask v191
! dead wire near top
mask h156>h159
! spot on rhs beam stop at 11m
! mask h57>h66+v134>v141
!
mask/time 13000 15250
!mask/time 5000 19200
!
L/R 41 -1 3
!L/SP 1 36864
!MON/LENGTH=17.937 2
!
! 6 May direct beam improves overlap (based on polymer std)
MON/DIRECT=DIRECT_RUN524_4m_06May11.dat
MON/TRANS/SPECTRUM=2/INTERPOLATE
!  set monitor 2 to interpolate
! PRINT  scale not sorted yet !!
MON/SPECTRUM=2/INTERPOLATE
FIT/TRANS/LOG 1.75 16.5
!
! 29/07/11 this centre found from gw20 9528
set centre 175.6 -168.8
!
! 29/07/11 gdw20 9528
set scales 0.1845 1.0 1.0 1.0 1.0
! correction to actual sample position, measured 115 before shutter, notionally 81mm before shutter
SAMPLE/OFFSET -34
! Correction to SANS2D encoders in mm 
DET/CORR REAR X -16.0
DET/CORR REAR Z 58.0
DET/CORR FRONT X -44.0
DET/CORR FRONT Y -20.0
DET/CORR FRONT Z 47.0
DET/CORR FRONT ROT 0.0
!
!! 29/07/11 MASKSANS2D.112H_4m_Lu stop flow (scale gdw with changer, offset above for stop flow)