Axle Risers

Don't have much information to personally share on this topic as our Pod came with the 4" risers already installed.

I installed the 4" risers myself in about 1/2 hour. You will need: wheel chocks, a hydraulic jack with enough capacity to lift one side of the Pod, a jack stand (to safely hold up the Pod chassis once you have unbolted the axle from the frame), and a correctly sized box wrench.  Most members who bought the risers stated that the cost was slightly less than $100.  A dealer will probably charge a full hour for installation (usually $100 or more). 
Don't forget that the tongue attachment angle will change...the receiver hitch should be slightly lower than the Pod's tongue when set horizontal.  The Pod should be slightly nose down.
If your tow vehicle is fairly high you may need to purchase a receiver hitch that has a drop-down.

Thank you all for your replies  Looking outside and seeing temps in the low 30's I think it can wait until spring when the temps will be more suitable.  Looks to be a fairly straightforward endeavor to accomplish.  Nice that our unit is less than a year old so nothing underneath is rusty or anything.  It is a definite thing I will do.  Cannot figure out why FR didn't install these in the first place; what was their reason outside of saving a couple bucks on the selling price?

I'm surprised that dealers don't mention the availability of the axle risers when folks order their Rpods. Most people wouldn't know to ask about them at the time of purchase. I had already read about the axle risers before we ordered our Rpod and ordered them at the time I ordered our Rpod. When you do that, they just put them on at the factory when they build the trailer so there's no additional labor cost involved.

Is the caster wheel the wheel that attaches to the front jack?