Obviously when the first metal and then graphite rackets came onto the tennis scene things changed pretty dramatically, but one thing I'm curious about is how much the wood rackets changed over the years, say from what Budge and his peers used in the 30's up until woodies disappeared from the pro ranks in the early 80's? I know this is essentially about rackets, but also involves the players from those prior eras, as people often wonder how they would have stacked up. Would the rackets have made a big difference? Were the stringbed sizes, weight, swing weight, flex, etc very different? Were there significant technological advancements over that period?