Is there some sort of tool or guide to do this? I used a sharpie to trace an outline on the shoes before removing the old ones. The new installation "looked" pretty good, but after putting some miles on them I had to tweak both of them a smidge to get them right again. I saw something called EZYCleat when Googling but nowhere in the US to buy it or anything similar. Feel free to move this to a different forum if it fits better elsewhere.

A lot of bike shops who use Fit-Kit use the RAD Kit for adjusting cleats precisely.

Wow. That's a lot of dough. I am really just looking for something much cheaper that will allow my to replace my own cleats to a reasonable level of precision. Once they are just a touch out you start adjusting to them and they feel wrong and the whole fitting/adjustment cycle starts over. I just don't want to go through that every time I change cleats. That's a really nice kit though...

Be more careful lining up your cleats next time you use the sharpie.

I just this morning put a new pair of shimano SPD-SL cleats on my new Mavic Zellium shoes and rode 22 miles......perfect.
I line up the point most top of the cleat with the front of the shoe from underneath of course and no problems.

BTW Zelliums are awesome shoes with SPD's. Complimented with 7902 DA pedals.

electrical tape: edges, bottom.

the sharpie would have been my first move also. i guess if that wore off maybe a small utility knife to scratch 4 tiny lines marking the cleat position??

I would just go with what pdxtex recommended and use a box cutter and indent lines into the shoe where your current cleats are. Can be precise since you can line the blade up against the cleat and cut exactly where it needs to go. I'll have to do this soon as well since my left cleat is looking a little worn, have wedges between my shoes and cleat so i may make two indentations to line up both so there exactly where they were.

I've successfully used a $10 plastic goniometer to replicate cleat alignment.

I recently replaced mine, I just used tape. Yesterday I realized my left foot didn't feel exactly right....I thought, "My right is PERFECT, when I get home I'll match the two." I probably just was scared and under-torqued a bit, because up until yesterday everything was gravy.