Telescope Reviews: DIY Wedge + Alt-Az

Hello,
Would it be possible to build a wedge and build an alt-az mount with drives and potentially add autoguiding?
Here's what I was thinking:

An alt-az mount appears to be very simple to construct and has very simple drives (basically, vertical/alt drive and horizontal/azimuth drive).

I'm not sure but I would think a wedge would be very easy to construct as well? I don't think wedges have drives since they are just aligned with one's latitude, right?

DIY autoguiding, in my opinion, is possible by controlling the drives using USB connections and regulating the voltage supplied to the drives. I think it would be possible to write some software to determine the error correction (using an attached guidescope) and then regulate the drives appropriately.

I would expect to use this 'mount' to do long exposure astrophotography (so no field rotation allowed) for about 1-4 hours.

It would be better than a barn-door mount w/ drives right? I'm not sure if it would be easier to DIY autoguiding for barn door mounts...?

Thoughts?
Thanks,
-D. Shankar

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