S-R skid issues that might affect the Calmini skid?
I have the S-R skid, and had no problems...I've never looked up close under a Calmini one, so I'm not sure why it would have problems either.
I think the main thing is to have a really long extension to get way up past the tank up to the bolts you'll need.
Here's the front of the stock skid:
Here's the rear bolt locations:
Here's the front with the S-R on:
Here's the stock skid next to the S-R skid:
I hope this helps to see how it goes on, its pretty straight foward really.
I used my floor jack to hold it up and get the threads started, and then just tightened it up and was good to go.
Notice I did pre-spray the OEM rust welds with nut blaster to make my life easier.