Update, so...the two foot extension of the tongue coupled with the rack at the front of the Aluma trailer caused cracks to appear at the rearmost mounting point of the tongue underneath the cargo area of the trailer. So, while the HF rack held up fine, the stresses involved mean that the rack is coming off my trailer. For now, it'll be either one of my Ural sidecar rigs or the TW200 on the trailer bed. Gave it shot, seemed to work in the short term but not in the long run. Luckily, a local welder reinforced the mount point for a very fair price and in a short time interval.