I think this thread is still fresh enough to not quite be a necro.
I am trying to figure out where the hundreds in savings would come in... MSRP may be $1400, but I just picked up an SDP for $1249.
So, let's see...
The SDP comes with Heinie Pro Straight 8 sights, which is one of the sight sets I have had added to other guns - I like them and Warren Tacticals.
So, figure $100-130 for the sights, depending on your sources.
The slide has to be milled for the Heinie sights. What does milling work cost in your neck of the woods?
Then, CZ Custom does a trigger job, including replacement trigger, springs, and hammer.
The aluminum grips are another $100 or so.
So I'm a bit perplexed as to where the theoretical cost savings would be, in doing one of these up as a project gun.