I just received and installed my two place Extreme today. Initial thought was there are a lot of parts for holding only two trimmers. Lots of extra hardware when I was done but extra bolts are always nice to have around but would of been interested in saving the extra $10 or so that could of been saved by not having to pay for the enclosed supports, bolts, etc. I installed the uprights as per instructions. Mounting the locking side directly over a rail support. The supports are angle iron turned 45 degrees so it looks like a V when looking at it from the top. Most trailers I've seen are like this. I ground out the outward edge and drilled through the support so that I could run one of the long bolts all the way through the support and I ended up using two of the bracing brackets to lock it into place. Very secure when I was done. The other support ended up being almost exactly in the middle of two other supports and after installation it twists the rail a bit more than I would like to see so when I take my trailer to do some welding on it soon I'll ad another support to it. As for the mounts that you attach to the trimmers that was where I had an issue. The machining on these parts are of course not needing to be to aircraft standards but I noticed one of the engine side mounts holes was drilled around a 1/16" off center so when you bolted it up the bracket was crooked and would not fit into the locking mechanism. I had to file it down and also file some welding slag out of both of the locking mechanism to get the trimmers to start sliding in and out freely. My opinions on the material used is that while the tubing is of fairly thin walled material and could use a little bit more beef I felt all the welds are very adequate. Overall I think a bit more quality control would serve this product well. We are talking about lots of moving, interacting parts after all and having to file parts down to even make them fit together doesn't bode well for how easy this product is supposed to be to use. Also all the trimmer racks I've used before I always rested the engine end on the hand grip so that less weight/leverage was being placed on the shaft. In this situation with the mounts being in front of the trigger it just adds that much more leverage. I have enough room on my Stihls to position these mounts behind the hand grips so I will probably go that route to reduce the leverage/weight even more. After seeing this product with my own eyes, reading the installation instructions and reviewing toro's OP I am going to say that Toro was responsible for the ultimate breakage of his trimmer rack. While the tubing could have thicker material the installation of his rack is faulty. The Instructions specifically say to install the engine supporting upright directly above a rail support and by looking at his pictures it is evident this is not the case of his installation. On top of this by looking at the overall state of his trailer and equipment I would be leaning towards saying he doesn't care for his equipment properly anyway. Just having constant dirt and filth can do funky things to metal. Just my opinion and no offense intended. As far as Jason Rose's post about the direction of the pins... after seeing how the product is designed you are able to position the pins in either direction to no affect of how the rack holds the products weight. If you were to position the mounts so that they put tension on each other you would not be able to put the engine end in the locking mechanism. I actually had to put one of mine on opposite of how their website shows to even get my curved shaft edger to fit properly. And yes the supports are installed the correct distance apart. Overall a nice product. Time will tell if it was worth the money over something cheaper. I think a cross breed would be a better product. Still have the mounts attached to the trimmer but it would just lower down into a cradle of similar design to the Trimmer trap and you still have a bar that lowers down on top of it to secure it. Simple design...no more moving parts than us simple folk are used to.