George,
I bought my regulator from a BBQ Supplier that sells stuff for trailer size BBQ's etc. I would have bought it from High Temp but it was before Wayne(insanity) took over. You might look online in Canada for one that way?
You can run your hoses from the forge back in copper tube. My hose is from a scrapped BBQ.
If anyone disagrees, then say so, but, I'd rather see the burner down. Less risk of it falling and saves space.
The blower isn't likely to spark a fire a d if you turn it on before you open the propane you should't have problems.
Also, I just cut the nipple into the forge off so the burner sits slightly closer, also to save room.
Looking good so far. It's going to be cool seeing your knives with Hamon's and you being able to heat treat quicker.