Hey man that sounds like my kind of guitar I love purpleheart an its my signature
wood and I only build 7-string guitars and every one has purpleheart
[iN,ON,OR THROUGH IT] purpleheart has a great deep tone and sustain and that totally go's well with the 7-string sound but a word of waring purpleheart is very hard and very dence and very heavy and will dull the sharpest of tool's and it's not the cheapest wood out there but if your mind is set on it go for it. I would love to see some pics when your done and hey welcome to the forum!! have fun and good luck.
!!METAL MATT!!