diff --git a/src/algorithmtypes.jl b/src/algorithmtypes.jl
index 57281d4..02d0bf3 100644
--- a/src/algorithmtypes.jl
+++ b/src/algorithmtypes.jl
@@ -14,7 +14,7 @@ abstract type AbstractAdaptiveMeshingAlgorithm end
 
 
 """
-    MarchingCubes(iso=0.0)
+    MarchingCubes(;iso=0.0)
 
 Specifies the use of the Marching Cubes algorithm for isosurface extraction.
 This algorithm provides a good balance between performance and vertex count.
@@ -28,10 +28,7 @@ Base.@kwdef struct MarchingCubes{T} <: AbstractMeshingAlgorithm
 end
 
 """
-    MarchingTetrahedra(iso=0.0, eps=1e-3)
     MarchingTetrahedra(;iso=0.0, eps=1e-3)
-    MarchingTetrahedra(iso)
-    MarchingTetrahedra(iso,eps)
 
 Specifies the use of the Marching Tetrahedra algorithm for isosurface extraction.
 This algorithm has a roughly 2x performance penalty compared to Marching Cubes,
@@ -75,10 +72,3 @@ struct AdaptiveMarchingTetrahedra{T} <: AbstractAdaptiveMeshingAlgorithm
     rtol::T
     atol::T
 end
-
-
-#
-# Helper functions
-#
-
-default_face_length(::Union{MarchingCubes,MarchingTetrahedra}) = 3
diff --git a/src/lut/sn.jl b/src/lut/sn.jl
deleted file mode 100644
index 610c62f..0000000
--- a/src/lut/sn.jl
+++ /dev/null
@@ -1,35 +0,0 @@
-const cube_edges = (0x00, 0x01, 0x00, 0x02, 0x00, 0x04, 0x01, 0x03, 0x01, 0x05, 0x02, 0x03,
-                    0x02, 0x06, 0x03, 0x07, 0x04, 0x05, 0x04, 0x06, 0x05, 0x07, 0x06, 0x07)
-
-const sn_edge_table = (0x0007, 0x0019, 0x001e, 0x0062, 0x0065, 0x007b, 0x007c, 0x00a8,
-                       0x00af, 0x00b1, 0x00b6, 0x00ca, 0x00cd, 0x00d3, 0x00d4, 0x0304,
-                       0x0303, 0x031d, 0x031a, 0x0366, 0x0361, 0x037f, 0x0378, 0x03ac,
-                       0x03ab, 0x03b5, 0x03b2, 0x03ce, 0x03c9, 0x03d7, 0x03d0, 0x0510,
-                       0x0517, 0x0509, 0x050e, 0x0572, 0x0575, 0x056b, 0x056c, 0x05b8,
-                       0x05bf, 0x05a1, 0x05a6, 0x05da, 0x05dd, 0x05c3, 0x05c4, 0x0614,
-                       0x0613, 0x060d, 0x060a, 0x0676, 0x0671, 0x066f, 0x0668, 0x06bc,
-                       0x06bb, 0x06a5, 0x06a2, 0x06de, 0x06d9, 0x06c7, 0x06c0, 0x0a40,
-                       0x0a47, 0x0a59, 0x0a5e, 0x0a22, 0x0a25, 0x0a3b, 0x0a3c, 0x0ae8,
-                       0x0aef, 0x0af1, 0x0af6, 0x0a8a, 0x0a8d, 0x0a93, 0x0a94, 0x0944,
-                       0x0943, 0x095d, 0x095a, 0x0926, 0x0921, 0x093f, 0x0938, 0x09ec,
-                       0x09eb, 0x09f5, 0x09f2, 0x098e, 0x0989, 0x0997, 0x0990, 0x0f50,
-                       0x0f57, 0x0f49, 0x0f4e, 0x0f32, 0x0f35, 0x0f2b, 0x0f2c, 0x0ff8,
-                       0x0fff, 0x0fe1, 0x0fe6, 0x0f9a, 0x0f9d, 0x0f83, 0x0f84, 0x0c54,
-                       0x0c53, 0x0c4d, 0x0c4a, 0x0c36, 0x0c31, 0x0c2f, 0x0c28, 0x0cfc,
-                       0x0cfb, 0x0ce5, 0x0ce2, 0x0c9e, 0x0c99, 0x0c87, 0x0c80, 0x0c80,
-                       0x0c87, 0x0c99, 0x0c9e, 0x0ce2, 0x0ce5, 0x0cfb, 0x0cfc, 0x0c28,
-                       0x0c2f, 0x0c31, 0x0c36, 0x0c4a, 0x0c4d, 0x0c53, 0x0c54, 0x0f84,
-                       0x0f83, 0x0f9d, 0x0f9a, 0x0fe6, 0x0fe1, 0x0fff, 0x0ff8, 0x0f2c,
-                       0x0f2b, 0x0f35, 0x0f32, 0x0f4e, 0x0f49, 0x0f57, 0x0f50, 0x0990,
-                       0x0997, 0x0989, 0x098e, 0x09f2, 0x09f5, 0x09eb, 0x09ec, 0x0938,
-                       0x093f, 0x0921, 0x0926, 0x095a, 0x095d, 0x0943, 0x0944, 0x0a94,
-                       0x0a93, 0x0a8d, 0x0a8a, 0x0af6, 0x0af1, 0x0aef, 0x0ae8, 0x0a3c,
-                       0x0a3b, 0x0a25, 0x0a22, 0x0a5e, 0x0a59, 0x0a47, 0x0a40, 0x06c0,
-                       0x06c7, 0x06d9, 0x06de, 0x06a2, 0x06a5, 0x06bb, 0x06bc, 0x0668,
-                       0x066f, 0x0671, 0x0676, 0x060a, 0x060d, 0x0613, 0x0614, 0x05c4,
-                       0x05c3, 0x05dd, 0x05da, 0x05a6, 0x05a1, 0x05bf, 0x05b8, 0x056c,
-                       0x056b, 0x0575, 0x0572, 0x050e, 0x0509, 0x0517, 0x0510, 0x03d0,
-                       0x03d7, 0x03c9, 0x03ce, 0x03b2, 0x03b5, 0x03ab, 0x03ac, 0x0378,
-                       0x037f, 0x0361, 0x0366, 0x031a, 0x031d, 0x0303, 0x0304, 0x00d4,
-                       0x00d3, 0x00cd, 0x00ca, 0x00b6, 0x00b1, 0x00af, 0x00a8, 0x007c,
-                       0x007b, 0x0065, 0x0062, 0x001e, 0x0019, 0x0007)