If you want to sell those canisters, send me a pm.
I'll give you a couple bucks and shipping.
As for the rubber boots cracking, any rubber treatment like a tire dressing should help preserve them, but nothing is gonna heal the existing cracks. When you get on the throttle, the carbs actually move back and forth a bit so the rubber boots flex. Any kind of a "crack" filler probably wouldn't last too long... you could put a carb brace on your carbs to prevent that.
And, if you removed/do remove your AI, you can use the plastic flex hose to connect 2 of the ports together. It just smoothes out the idle a bit....
