Thanks for the feedback. Since posting it occurred to me I may be overdoing it with cargo space (and weight). My concern now is as you say...balance. I'm afraid if I load the rear of the bike it will become even more challenging holding the bike up with my legs when stopped. Having all the weight in a trailer would solve that and the rack could be used for some light items or a small pack to hold the stuff used frequently while on the road.

I would be happy to hear your feedback riding your Slipstream. I'm still acclimating to the feel. When I first started riding I habitually tried riding fast and always pushing it. Now I have learned to relax more and "ride ahead" to anticipate any situations that may challenge my ability to control the bike effectively.