You could use a length of pipe the right diameter just to slide over the end of your wrench handle. This has been my favorite "cheater" for years. Some hardware stores sell short lengths of pipe to make pipe clamps cheaply so you won't have to lay out lots of cash.

Can you have someone hold the rear crank on the opposite side of the bike so that you can focus on lining yourself up "just so"? Even with years of experience on tandem wrenching I still like a second pair of hands for some operations so I don't lose my balance at the moment of victory by trying to catch the bike.

Take your time, plan ahead, and then you won't suffer the ill effects some of us have!

My knowledge of torque wrenches is not broad at all since we Canadians have different brand names for lots of these tools. However, if you head on over to http://forums.thepaceline.net/and search on torque wrenches there you should find lots of recommendations.

Here I apologise for being a gorilla in the shop in my early wrenching years; I have atoned for it many times over with bruised and skinned knuckles, broken tools, ruined parts and general frustration too.