Bach tends not to work on manic dogs and also I would be a wee little concerned with the alcohal even in the small amount.
There is other alternatives if meds are needed. One being Bio calm which is under a different name in the states and has been tested in a double blind study.
I would prearrange some Friends and neighbors to toss little one treats that are extra special as he approaches at the limit of his reaction point.
So right at the point he gets upset stop and treat him.
I also get my hands on Turid Rurgass book Calming signals so you know what he is trying to tell you and you can signal back.
Also I try to get him in an anxiety wrap so when he goes out he is calmer.
This can be done by just using a jogger that is tight fitting and or a tensor bandage. Clicker solutions has a link to wraps also The site below has some wonderful info.
http://www.animalambassadors.com/practitioners.shtml
Also a Gentle leader or a halti but it you run halti make sure it is attached to the collar or to a harness so if it pops off you still have him.
I have a few other aggression books that I can give you that are not on clicker solution site but are wonderfully helpful.
Best of Luck and keep up the good work.
Joy