What feels like the cranks skipping a beat

So anyway way question 1 :

I'm guessing the chain dropping off was due to it being slack, but does anyone have a good method for getting really good chain tension? I'm running an old bob jackson frame, with front loading horizontal drop outs. I just can seem to get the chain super tight?

the "walking method" check sheldon's website, basically involves, having one track nut tight, pulling the wheel to one side, tighten that side, loosen other side, pull that way. in this way the wheel "walks" in the dropout, enabling perfect tension. when in correct place, make sure wheel is centred and just tighten the nuts down.

If the lack of lockring tool is referring to the quote at the top of the link, is it not a typo and meant to say

"enables the secure assembly of a track sprocket without having to use the traditional lock ring tool"

you don't need a lockring tool to put a cog on?