A little late, but make sure you do not put too much torque on the front breech to frame screw. Unlike the ion, the epiphany has a standalone threading that can snap off.
Same thing with the banjos. Those suckers don't seem like they're too awful tight until they snap in half.
Make sure to use quality 9v batteries. Smart Parts markers are very picky about their power sources.
If the marker hasn't been uses in a while, I recommend going through and cleaning, maintaining and lubricating the reg and bolt.
Unless it has an aftermarket board, be gentle on the battery harness. A little tight to resolder those wires back on.
And if it has the stock Smart Parts On/Off ASA, be careful when connecting your tank. They have had issues with stripping and binding the threads (ripped three whole rotations off my buddy's tank bonnet).