The K-1133 is a mid driver, the K-1132 is a high frequency driver.
I have found on my jubilees that the B&C D-75 driver which is used on many klipsch pro speakers bests the K-69 by quite bit. Also, there are active settings around to support the B&C driver with the 402 horn and jubilee bottom. There are no settings for the 510 when used with the B&C driver, but the 402 settings should be close enough to start with.