I'm a huge fan of magitech, but the way you're talking about it makes it sound like it's just magic existing alongside technology- so much more you could do!

What about a steam engine that drew heat from a Solar Core, a chunk of the sun that had been summoned and bound? Along with radiating heat, it also radiates magic, so to get the full benefit of both, a medium other than water could be boiled- perhaps mercury, which then traps a huge amount of magic energy along with the pressure of expansion.

Also, they already have trains and electricity in the show :P