There seem to be a few duplicated vert pairs and some not quite symetrical pairs of verts in the new base.obj mesh.
Duplicate pairs
para 1 -(para 3) para 2
x y z idx
0.246829 , -1.009966 , 6.718027 ,9565
-0.246829 , -1.009966 , 6.718027 ,10071
0.246829 , -1.009966 , 6.718027 ,9615
-0.246829 , -1.009966 , 6.718027 ,10023
0.250552 , -1.015286 , 6.749450 ,9566
-0.250552 , -1.015286 , 6.749450 ,10022
0.250552 , -1.015286 , 6.749450 ,9614
-0.250552 , -1.015286 , 6.749450 ,10072
0.253327 , -1.008435 , 6.709029 ,9580
-0.253327 , -1.008435 , 6.709029 ,10094
0.253327 , -1.008435 , 6.709029 ,9636
-0.253327 , -1.008435 , 6.709029 ,10038
0.269734 , -1.007944 , 6.709931 ,9579
-0.269734 , -1.007944 , 6.709931 ,10092
0.269734 , -1.007944 , 6.709931 ,9635
-0.269734 , -1.007944 , 6.709931 ,10039
0.276714 , -1.014344 , 6.717493 ,9556
-0.276714 , -1.014344 , 6.717493 ,10098
0.276714 , -1.014344 , 6.717493 ,9641
-0.276714 , -1.014344 , 6.717493 ,10012
0.286488 , -1.009660 , 6.708847 ,9576
-0.286488 , -1.009660 , 6.708847 ,10054
0.286488 , -1.009660 , 6.708847 ,9596
-0.286488 , -1.009660 , 6.708847 ,10035
0.299129 , -1.012434 , 6.711469 ,9578
-0.299129 , -1.012434 , 6.711469 ,10033
0.299129 , -1.012434 , 6.711469 ,9597
-0.299129 , -1.012434 , 6.711469 ,10053
0.306409 , -1.022462 , 6.739858 ,9572
-0.306409 , -1.022462 , 6.739858 ,10077
0.306409 , -1.022462 , 6.739858 ,9620
-0.306409 , -1.022462 , 6.739858 ,10030
0.306599 , -1.018723 , 6.716958 ,9557
-0.306599 , -1.018723 , 6.716958 ,10011
0.306599 , -1.018723 , 6.716958 ,9599
-0.306599 , -1.018723 , 6.716958 ,10056
0.307076 , -1.021269 , 6.737846 ,9554
-0.307076 , -1.021269 , 6.737846 ,10083
0.307076 , -1.021269 , 6.737846 ,9626
-0.307076 , -1.021269 , 6.737846 ,10014
Non-symetric pairs
para 1 -(para 3) para 2
x y z idx
0.015372 , -1.368147 , 1.839616 ,1057
-0.015000 , -1.368147 , 1.840000 ,6419
0.017311 , -1.381778 , 1.882267 ,1053
-0.017331 , -1.381778 , 1.882267 ,6426
-0.189979 , -1.381000 , 7.274184 ,2103
0.190000 , -1.381060 , 7.274000 ,3304
-0.191929 , -1.371893 , 7.265889 ,1898
0.191929 , -1.372000 , 7.265889 ,3135
0.191929 , -1.381000 , 7.265889 ,3134
-0.191951 , -1.381060 , 7.265851 ,1897
-0.203019 , -1.390840 , 7.274019 ,2094
0.203000 , -1.391000 , 7.274000 ,3295
0.298000 , -0.336000 , -2.624000 ,748
-0.298105 , -0.336030 , -2.623813 ,6677
0.386000 , 0.286000 , -4.606000 ,785
-0.385614 , 0.286341 , -4.606097 ,5751
-0.413623 , 0.011000 , -4.219026 ,6655
0.414000 , 0.011128 , -4.218880 ,778
-1.312365 , -0.099530 , -3.096069 ,11161
1.312000 , -0.100000 , -3.096000 ,11154
-1.327273 , -0.229892 , -3.813290 ,6579
1.327000 , -0.230000 , -3.813000 ,865
1.340937 , -0.013979 , -3.446861 ,872
-1.341000 , -0.014000 , -3.447000 ,6580
-1.374816 , 0.017652 , -4.132000 ,6667
1.375000 , 0.018000 , -4.132009 ,757
-7.764316 , -0.536498 , 5.395826 ,7007
7.764000 , -0.536498 , 5.396000 ,362
7.767000 , -0.480700 , 5.382000 ,4423
-7.766926 , -0.480700 , 5.382017 ,7657
-7.769997 , -0.416767 , 5.397536 ,7659
7.770000 , -0.416767 , 5.398000 ,4424
7.833000 , -0.537162 , 5.405000 ,363
-7.833261 , -0.537162 , 5.405429 ,7006
7.840000 , -0.422897 , 5.400753 ,4425
-7.840167 , -0.422897 , 5.401000 ,7658
-7.840288 , -0.484594 , 5.387000 ,7656
7.840000 , -0.484594 , 5.387203 ,4422
7.889249 , -0.438000 , 5.496569 ,375
-7.889109 , -0.438088 , 5.497000 ,6950
-7.891000 , -0.434000 , 5.496569 ,6949
7.890794 , -0.434012 , 5.496648 ,407
-7.895809 , -0.442597 , 5.503000 ,6985
7.896105 , -0.443335 , 5.502997 ,374
-7.895555 , -0.443674 , 5.510216 ,6986
7.896000 , -0.444000 , 5.510000 ,373
-7.959097 , -0.195965 , 5.501719 ,6083
7.959008 , -0.195965 , 5.501957 ,1379
7.969000 , -0.201213 , 5.501719 ,1352
-7.969009 , -0.201308 , 5.501727 ,6113
-7.969842 , -0.202554 , 5.508364 ,6118
7.969854 , -0.202567 , 5.508396 ,1355
-7.978311 , -0.206559 , 5.515995 ,6138
7.978333 , -0.206627 , 5.516000 ,1346
7.979151 , -0.205702 , 5.506000 ,1347
-7.979187 , -0.205751 , 5.506375 ,6137
-7.989845 , -0.212299 , 5.506000 ,6143
7.989889 , -0.212371 , 5.506375 ,1342
7.989696 , -0.213065 , 5.515000 ,1343
-7.989675 , -0.213066 , 5.514843 ,6145
note*
The index number is order of the verts after the wavefront object is imported into blender.
I'm not sure if this order is constant.
There is also a rotation when a wavefront object is imported into blender.
The second and third "v" params are swapped and then the second is inverted.
eg.
v 7.890794 5.496648 0.434012
7.890794 , -0.434012 , 5.496648 ,407
Tim