I do think they are actually pretty common - I have three -- my sire pin and two out of three of his offspring -- the third one has a small break like BTs but the other two are full stripes.
BT that reduced clean looking one on the bottom is nutz! I still think the best individual pin I have ever seen so far is that crazy busy patterned female you hatched out earlier. BT puttin' on a pin and lesser breeding clinic this year, good job man!