Kevin Cammibest is actually inbred not linebred as the duplications are in the third generation. The mantra from the TB pedigree scholars is inbreeding on the sire line is rarely successful (though they are less dogmatic about it since Northern Dancer came along) unless there is an equally strong representation of females from an unrelated line which is what Cammibest demonstrates. Pub Blitz is inbred to Tyler B through a son and daughter which is preferable to through 2 sons. Big Band Sound is a 7/8 brother to TylerB which makes Pub Blitz even more in/linebred. Fortitude Hanover has Breath of Spring in his pedigree which is Harold J full sister, something Tesio was big on, and possibly more significant then the in/line breeding to MHF

Harvey's Grinfromeartoear/Presidential Ball example "Not Enough" dam is by Presidential Ball out of the dam of Cammibest so is a actually a 3/4 relation to Cammibest as PB and Cambest are both by Cam Fella and she is inbred to MHF. "Not Enough "also has the full brother and sister Harold J and Breath of Spring 4x 4 as well as another strain of B of S. which would be the Tesio enthusiasts key to her success.

Harveys other example is "Monkey on my Wheel" by Mach Three who has demonstrated quite a lotof success with mares by sons of Cam Fella in North America and here. Mach Three may be out of your reach but he has a full brother standing in NZ Extreme Three who wasn't as good a racehorse and is still largely unproven as a sire but it's reasonable to assume would do best with the same lines that his brother has.