I made a frame bag for the Pugsley, in order to make it ready for some overnighters. A frame bag allows putting heavy gear in the middle of the bike and with a low center of gravity, which means it does not affect the handling of the bike very much. My experiences from the Fargo are very good in this matter. It really is nice not to have a heavy rucksack (or even a lighter one) when riding.
The frame bag took me about seven hours to make, and while the craftsmanship probably is far from that on the commercial alternatives, the result seems quite good. I used 1000D Cordura, which is pretty strong. Spectra would probably be both stronger and lighter, but the finished bag still weighed only 300g, so I think the Cordura is a good alternative. As I understand Spectra is both hard to find and more difficult to use.
The design is basically the same as on the one I made for the Fargo. which has worked great. The bag is divided into two compartments by a velcro divider, which make it possible to adjust the width also in the middle of the bag. Two zippers give access to the compartments. The frame bag was loaded with some camera equipment, bike gear and a down jacket (no compression bag) to really fill it up for the test ride.
I added a map pocket to the left side panel. Might come in handy.
The Pugsley frame bag is a lot wider. On the Fargo I made the panels that go against the tubes 6 cm wide and on the Pugsley 9 cm wide. The Pugsley has a wider BB than the Fargo and the frame triangle is lower, which should allow for more width. A three hour test ride revealed no problem, but I would not go much wider. The velcro fastening system does make it possible to tighten it more, thus making it more narrow if necessary. It worked great as it was, though.
I also added bottle cages to the fork, just like the Fargo has. Thanks, Coastkid, for showing how to easily do this. Now I need to find some thermos bottles that fit into the bottle cages.
Some final things still remain to do before the Pugsley is fully ready for multiday trips. I will probably add a bottle cage to the downtube and order a rack for the front as well. The cables prevent strapping a drybag to the handlebar like on the Fargo, hence the need for a front rack.