I track the v-tracs in my software and it looks like there is a real nice balance on the quantity of the v-tracs in each root.

Root Sums:
0 0 0%
1 8 11.4% 1135 1144 1225 1234 1333 2224 2233 4555
2 8 11.4% 1145 1235 1244 1334 2225 2234 2333 5555
3 8 11.4% 1155 1245 1335 1344 2235 2244 2334 3333
4 8 11.4% 1111 1255 1345 1444 2245 2335 2344 3334
5 8 11.4% 1112 1355 1445 2255 2345 2444 3335 3344
6 7 10.0% 1113 1122 1455 2355 2445 3345 3444
7 8 11.4% 1114 1123 1222 1555 2455 3355 3445 4444
8 8 11.4% 1115 1124 1133 1223 2222 2555 3455 4445
9 7 10.0% 1125 1134 1224 1233 2223 3555 4455


Number Types:
no match 05 07.1% 1234 1235 1245 1345 2345

doubles_ 30 42.9% 1123 1124 1125 1134 1135
________________1145 1223 1224 1225 1233
________________1244 1255 1334 1335 1344
________________1355 1445 1455 2234 2235
________________2245 2334 2335 2344 2355
________________2445 2455 3345 3445 3455

dbl/dbl_ 10 14.3% 1122 1133 1144 1155 2233
_______________2244 2255 3344 3355 4455

triples_ 20 28.6% 1112 1113 1114 1115 1222
_______________1333 1444 1555 2223 2224
_______________2225 2333 2444 2555 3334
_______________3335 3444 3555 4445 4555

quads___ 05 07.1% 1111 2222 3333 4444 5555