Go-Jacks not fitting
 

So I finally decided to purchase a set of Go-Jacks for the Boxster so I could move it around the garage to fit multiple cars in. Went to slide them under the car for the first time and the bolt on the top of the caster hit the back cross brace next to the rear tires.

Does anyone here use go-jacks, and if so, did they work for you? I am thinking I may need to back the Boxster onto a 2x4 pad to give it enough space to jack it up and move it. I am open to any other suggestions. Thanks.