I'd go a small reel, so you can launch the SMB while still submerged handy if you are drifting in a current and still have stops to do!
You can get some real dinky ones now AP Valves, the guys that make the Buddy jackets and Inspiration/Evolution, do a tiny reel which will easily fit in your Knighthawk pocket. I have a Scubapro Glide Tek wing, which is very similar to a Knighthawk, and it fits in its tiny pockets with no problem.
Mark
You can get some real dinky ones now AP Valves, the guys that make the Buddy jackets and Inspiration/Evolution, do a tiny reel which will easily fit in your Knighthawk pocket. I have a Scubapro Glide Tek wing, which is very similar to a Knighthawk, and it fits in its tiny pockets with no problem.
Mark