Kitty Cat Snowmobiles

I have a stock kitty cat with the govenor tied up.
Has anyone ever drilled the weights to get higher engagement?
Is there someone out there with different weights, springs, etc?
The dragon one is awesome, but once I have it dialed in I wont be changing it.

Travolta:

Give me a call or email (customer@obups..com) me. I am a MaxTorque distributor and dealer and I have different tension springs for $8 that increase engagement without drilling the shoes. You can drill the shoes if you want to and I can explain how to do this without destroying the shoes.