I don't post here much.  

I want to build a semi-automated electric brewery.  I usually do 5 and 10 gallon batches of lager type beers.  I need to do a protein rest before a beta and alpha amylase rest.  Anyone got any interest in doing this?

I have done multi-step mashes and noticed VERY LITTLE IF ANY difference in the final outcome of the beers to include lagers. I have not done decoction, but a single infusion is simple and repeatable.

Agreed, and brulosophy.com even just did triangle tests with HUGE swings in single infusion rest temps (like 148 to 160) on the Session podcast the other day and they couldn't consistently pick them out.  I was thinking of making a system to do multi-steps but I decided the extra work involved wasn't worth the squeeze.

Fermentation, yeast and cellar stuff (cold side) makes the most difference.

I concur with what others have said about step mashes.

When I originally built my semi-auto e-brew stand I designed it to be a HERMS.  I could program in 3 mash temp steps.  Found it was really tough to change the temp of the mash that way and noticed no difference in the beers.  I've since pulled all that extra valves/tubing off and insulated the crap out of my mash tun.

I've been eyeing up this system...

http://brewtronix.com/

I just completed building my electric brewery. Three 20 gallon kettles, 50 amp control panel, full EHERM setup. I should have built it years ago. Total control over mash temps.  Saves me hours on brew days and the beer is better.  Now that I can do rest at the push of a button, I have to agree with the others here.  I don't see any improvement in the beer over a single infusion mash. I will say build one and find out for yourself.  I got my plans from www.theelectricbrewery.com

Here is my setup being built.  It's done now I just haven't updated the link with photos.

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Did you build the control panel yourself?

Yes, it was easier than it looks. Cutting the holes in the enclosure was the hardest part.  knockout punches is the only way for the small holes.  I had to use a hole saw for the large ones.  Large knock out punches are high dollar.  It was costly but worth every penny in time saved.