Here's a couple of pics of how the exhaust convertion went. Firstly thanks to the guys contributing to the flow through exhaust mods. My right pipe is now running as a flow through with the 2" perf pipe, some SS wrap and stuffed with exhaust fill, sounds awesome esp on decel, maybe a tad louder with a deeper exhaust note. Left side which has the small stub section off the mid pipe now has a disc welded into the stub and another welded into the hole left where the cat was cut off, see pic. Between the two blanks there is a number of air holes drilled to avoid heat buildup travelling into the storage can. This has worked a treat with the tube staying cool right the way down. For the end cap I wanted to keep the standard look and have ground out slots where the rivet holes were in the end cap. There is a tight rubber strap riveted half way along the tube which pulls the end cap into place and doesn't fall out. While its not a lot of storage (about 4 litres worth) its sufficient for all my tools and spares I'd carry on a long trip, which puts those weighty items a bit lower. Overall I'm pretty happy with the outcome
I've seen your weather forecast, plenty of time! Currently working on something similar. Little larger capacity but need to watch out for the caliper.
Haha. If I didn't have the Hawk partially apart already, I'd consider tearing into it. One project at a time, have to have at least one bike ready to go when spring finally does arrive.