After seeing my Givi T411 Voyager Saddlebags rub the paint job on the VFR and VStrom and the Two Brothers logo on the VStrom, I finally broke down and got a pair of Givi E36N cases. These cases are designed to be either top or side cases. With the addition of the Givi PL528, I will mount them as side cases. I found all three components (2 x E36N’s and 1 x PL528) for a bit of a discounted price compared to most websites. A company out of Southern Georgia called RL Motorcycles has a website dedicated to Motorcycle accessories. The cases and PL528 were a bit under typical MSRP and shipping is a flat $9.95 per order!
The PL528
The PL528 consists of three major parts. The two side case holders and a crossbar for stabilization.
My first step was to remove my Givi top case rack to access the two bolts that hold the rack to the top of the motorcycle’s sub-frame. This was a fairly simple task. There is a plastic cover held by four (4) small screws. After removing that, there are four (4) nut/bolt/washer combination holding the Givi rack mount to the Suzuki rack. Remove those to access the two bolts that mount the rack into the sub-frame. I found that using a magnet to hold the nuts steady made it easier to remove and install the nut/bolt/washer combos on the front two bolts. Remove the two bolts that hold the rack to the sub-frame. These will be replaced with the large bolts that came with the PL528. 
Wiggle the two side case holders into place. Get the two new Givi-supplied bolts into place and hand-screw them a few turns. Do not tighten them all the way as the other bolt holes won’t line up as easily. You will find that the lower bolt hole lines up with the top hole on the passenger peg mount. That is where you will place the bolt/washer/lock-nut combination. Again, do not tighten them until later, or the crossbar won’t line up. Side story: Funny thing is I have learned the old “don’t tighten first” trick from working on modifications/repairs on bikes, cars, etc. I actually remembered this time, not to tighten everything down. Then, the other night, I was watching Dirty Jobs on Discovery Channel. Mike Rowe, coincidentally, started tightening down some bolts one at a time. The guy leading him promptly said, “Don’t tighten them as you go like that or you won’t get the last one on.”
Back to business. Now that you have the bolts in place. Get the crossbar in place and use the funky-looking, concave washer and flush-mount bolts. Get these bolts in place and started. Now, tighten away! I would start with the top two bolts, then the passenger peg bolts, and finally the two crossbar bolts. Now you can put the top case rack back into place. Remember, use the magnet trick seen above to get the nuts on the front of the rack. It is not necessary, but it is helpful.
The E36N
That funky-looking, concave washer is the lower mount for the side case. You will notice that the side case will rest on the two mounts and snap into the large tab. It is simply the same interface as the top case turned 90 degrees!
See all the photos: http://photos.tonyfugere.com/gallery/v/vehicles/bikes/vstrom_k12/givi_sidecases/