F.ttp_begin({
 stn = "Leekston East", -- station name
 tt = "NX_N", -- timetable ID
-- depint = "05;00", --departure slot interval
-- depoff = "02;00", --departure slot offset
 depint = "02;30", --departure slot interval
 depoff = "01;15", --departure slot offset
 doorside = "R",
 only_lines = {XN=true},
 force_tt_reset = false,
})