I have an 80" Woods offset mower that has no slip clutch and no shear pin, (shear pins drive me nuts). I do however have four very large belts that run in parallel with each other on a massive pulley assembly with an automatic tensioner. The belts do a great job of absorbing shock and now after 7 years of use, they still look like new. I'm sure that if I ever had to replace them, it would be expensive, but very simple. They do a great job of shock absorbing. Rat...