I am planning on replacing the stock R shaft in my Taylormade R7 Superquad TP driver, I will need to confirm which shaft it is (55g, 65g or 75g) for an A Flex Graphite Design G-Tech (69g) shortened to 44.5in.

TM specs for the driver was SW D4, using a standard sized grip etc, will this potentially leave the swing weight the same, lower or raise it?

Unless the shaft profile in the stock is different, will this shaft help potential club head speed?