Re: rear sprockey alignment
I use a table with a slot cut in it, the wheel sitting in the slot with a piece of wood screwed to it (table) that I can swing over near the sprocket. I can then tell how much the sprocket is out while tightening it.
I use a rubber mallet, after getting it firm, but not tight, and "adjust it" as needed. just smack it on the teeth, and if your hole is drilled on center (measure it if you have any doubts) you will eventually get it on straight.