but do go with the top-hat case instead of flat pack, you won't regret it.
For number two, the 'high-current' VR, look at that transistor sitting there all alone. Now look at number 3, "12V 15A...." See how the transistors are paralleled with a small resistance to keep them from running away or one getting the lion's share of the load and cooking? (That's all those are for, really, load balancing. But you need them.)
Now combine number three into the circuit for number two adding a few transistors/resistors in parallel until you get to your 25 Amps. (Shoot for 25, not 22.2 or whatever. "Super-size" isn't a bad thing in this instance, but we all should stay away from those bigger burgers.)
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