Can't say I understand why hot transfer gave u registration probs unless
you did separate passes for each side.
I hot transfer both sides at once so there are no registration issues.
I still prefer hot transfer since I can do foiled silk screens etc and
it is faster. Also no fumes to speak of.
Then again I have the single pass Apache AL13P PCB laminator to do a
transfer in one go so there are less steps to do it.
Print, place on PCB...one pass transfer - including double sided (corner
pinhole alignment with vias) or toner silk screen on one side ..all in
one pass.
No volatile chemicals really. Just an isopropyl wipe on the PCB before
transfer.
Ancel