I originally purchased my Kogswell P/R (59cm) in early 2009 to replace my On One il Pompino as the daily commuter and all-purpose city bike. I haven't experienced several features--650b wheels, low-trail front end geometry, standard-size tubings--prior to owning the P/R, even though I have specified them for my then incoming Ebisu All-Purpose. After the first several rides on the P/R I fell in love with its handling and ride quality. Combined with general lack of affordable porteur rack at the time, the P/R remained more as a randonneur than a porteur, sporting a mini-front rack with a boxy handlebar bag sitting on top of it.
A year and 3000 miles later, I acquired a factory-second Velo Orange porteur rack from the online bike component company for approximately half the price of a new rack. The rack hung in my garage for a few months as I mulled over the option of using it. Obviously I will welcome the additional load-carrying capability that the porteur rack offers, but I was wondering about potential adverse effects on bike handling--stiffening of the fork, additional weight. I also had for a while a fixed-gear town bike (a Raleigh One Way) that was set up with a Soma front rack and a Wald basket to carry groceries, etc. I later sold the fixed-gear bike as it wasn't practical and gentle to my knees, and replaced it with a Rawland cSogn toward the summer.
With Rawland taking on trail-riding duties and Ebisu covering the long-distance rides well, I finally got the impetus to install the porteur rack on the Kogswell. It was relatively easy; these racks now come with pre-drilled tabs. I ended up using the lowest holes on the lower tabs even though they seem to be designed for 700c wheels. I also attached the metal fender to the tap under the rack. Finally, a pre-drilled rack strut connects the rack to the brake hole. The kogswell has two eyelets at the fork dropout. Typically the rear-facing ones are reserved for attaching fender stays. However, the VO porteur rack was designed in a way that it will only be level to the ground if it uses the rear eyelets instead of the front ones, usually reserved for racks. I cobbled together a collection of spacers from my fasteners bin, and install the fenders and the racks to share the same eyelets with minimal-to-none interference.
Several changes ensued. I swapped out the on-one midge handlebar and put a pair of Nitto Randonneur bars (that became available after my wife's Ebisu receives an update to Nitto Soba bars) and put on a pair Tektro brake levers (that are shaped closer to Shimano STIs than Campy Ergos). I also put in the Schmidt SON20/Velocity Synergy dynamo wheel and a Busch and Muller IQ Cyo front light. Most recently, I swapped out the hardy Rivendell fatty rumpkins for the newly available SOMA B-line 650x38b tires, which resemble the venerable Panaracer Pasela tires available in 700c and 26" wheel sizes.
I have carried plenty of loads on the front rack and the bike's handling never suffered for them. I have even taken the new-look P/R on several long and hilly rides and felt that it performed well. The P/R is really a versatile bike, too bad Kogswell doesn't make it anymore, and Anthony and Longleaf is considering separating the P and the R functions. Rawland is re-designing the Sogn and it sounds like the new Sogn will be closer to the P/R then the current Sogn. I look forward to the product of that endeavor.