[
objects.reprap.org] (big picture of Mendel)
There's a notch in the bed table, like it was a clearance cut for a stepper or something, but I can't see why it's there.
Sorry for all the questions, but I'll be attempting a RepStrap and I'll have to translate the design decisions over to wise choices in my material of choice.
I'm probably going to go with a scaled up version of Mendel, using angle iron as the structural supports, and probably a different (SAE) pitch for the Z lead-screws. Extra torque and higher voltage stepper motors with 200 step per revolution. A router for the first toolhead (I plan on some light milling). Oh and relocating the controller boards up top and making a few other design choices so I could retrofit a liquid coolant system later.