Creating TIN, Surface Difference python script with ArcPy?

I have been trying to develop a master script to go through a series of geoprocessing tools and executing them. I am trying to generate a TIN and contours from a raw xyz file. Below is a very simple script that integrates the various tools. I am having difficulty inserting the correct inputs and outputs for the TIN generation and Surface Difference calculation/generation. Let me know if i am missing an input/output specification or a simple default value. I tried doing this same workflow on Model Builder to then export its python script, however i was unable to execute a successful TIN Output since for some reason only allowed for a Raster Output.

Note: I decided not to insert variables, i went directly to its filename.

import arcpy, exceptions, sys, traceback
from arcpy import env
from datetime import datetime

start_time = datetime.now()
print "The program has began processing", start_time


try:
    #Enables ArcGIS 3D Toolbox
    arcpy.CheckOutExtension("3D")
    #Set workspace
    env.workspace = "C:Standalone"
    #Set Spatial Reference using Well-Known ID  NAD 27 State Plane Missouri East FIPS
    sr = arcpy.SpatialReference(26796)
    #XYZ Processing to Point Shapefile
    arcpy.ddd.ASCII3DToFeatureClass("004d1214_3x3.xyz", "XYZ","004d1214_el.shp", "POINT", "1",sr,)
    arcpy.AddMessage("Processing Complete")


    #Add XY Coordinates 
    in_features = "004d1214_el.shp"
    arcpy.AddXY_management(in_features)

    #Create TIN surface out of the generated point shapefile
    arcpy.ddd.CreateTin_3d("tin004d1214_el",sr,"C:Standalone04d1214_el.shp POINT_Z Mass_Points <None>","DELAUNAY")

    #Delineate TIN Area. Verify that maximum edge length is greater than the point spacing.
    arcpy.ddd.DelineateTinDataArea("tin004d1214_el", 10, "ALL")
    arcpy.AddMessage("Complete")

    #Trigger Surface Difference to yield new elevation, Insert optional directories for TIN output
    inSurface = "tin004d1214_el"
    inReference = "CLASSIFIED PATH DIRECTORY"
    outTin = "tin004d1214_lrp"
    outPoly = arcpy.CreateUniqueName("004d1214_lrp.shp")
    arcpy.SurfaceDifference_3d(inSurface,inReference,"C:Standalone04d1214_lrp.shp",outTin) #Check for syntax

    #Generate Surface Contours off the Reference Survey surface
    arcpy.SurfaceContour_3d(outTin,"004d1214_contours.shp")  #Check for contour field add


except arcpy.ExecuteError:
    print arcpy.GetMessages()
except:
    # Get the traceback object
    tb = sys.exc_info()[2]
    tbinfo = traceback.format_tb(tb)[0]
    # Concatenate error information into message string
    pymsg = 'PYTHON ERRORS:nTraceback info:n{0}nError Info:n{1}'
            .format(tbinfo, str(sys.exc_info()[1]))
    msgs = 'ArcPy ERRORS:n {0}n'.format(arcpy.GetMessages(2))
    # Return python error messages for script tool or Python Window
    arcpy.AddError(pymsg)
    arcpy.AddError(msgs)

end_time = datetime.now()
print ('Duration: {}'.format(end_time - start_time))