That sort of thing has scared me sh**less with my SK8. A few times I really thought i'd stuffed it good, but after walking away in disgust for a few days, it suddenly started working. I've come to the conclusion that these SK keyboards are nearly bullet-proof.
However, here's a bit of a tip that will protect your machine while you're poking around - make a circuit bending test cable - a piece of insulated wire with an alligator clip on 1 end, and a multimeter probe on the other.
Now, cut the wire and solder a 10k resistor into the wire somewhere.
Now use it to test your bends. If you accidentally happen to hit a potentially damaging connection (such as shorting out the power supply rails with a chip somewhere) then the main brunt of the power is blocked by the resistor, and your circuit will stand a much better chance of surviving. 90% of all bends can still be achieved with the resistor in place. For the other ones, check the SK schematics first and identify which tracks are carrying the power, and mark them as a warning when poking around.
Cheers, Graham