Too Tired For Toys :-(

Got a new toy today - a Lens Align system to help me determine whether my lenses are focussing where I want them to, or where they decide to, or both (I think that's all the options).

There is a certain amount of assembly required, and, although the instructions are probably excellent, I'm too tired to understand them tonight, so I think I'll have to wait until the weekend to open this can of worms get stuck in. Those of you who know me will know that there's going to be a spreadsheet involved somewhere...!