Hey what's up ripped,got advice from you last week about brass block upgrade,went ahead and ordered it but 2 days later realized it was for a 6-string,seller says it will fit but can only use 3 springs,guitar currently has 4,will 3 be enough or should I send back for 7-string block.Which one do you have?Am tuned down to A standard if that helps to determine number of springs. Thanks Joe