42 rolls is sweet.How long have you been practicing.btw,there is a clip on decknique where some guy does 63 rolls in one minute.But his hand is held vertically.
i think the current OFFICIAL record is held by August Meyer who did 51 rolls in a minute.There are guys who can do more in their rooms.But stress of the situation needs to be considered.
I can do like... 3... I both suck, and don';t practice. Griffon rolls howeever, I can do about 43 (Thumb to pinky to thumb is one. If I drop it, I don;t stop, but I have to pick it up and keep going)