Hello all

I am preparing to build an oil tank arch for next season. I had a couple question hope you can help with

1) I am planning on using copper drop tubes on homemade pan. I know on most arches they ramp up in back. Should I also ramp up in the back and just adjust drop tube depth or keep it flat with the same size of drop tubes.

2) what should the deminisons of the firebox be?

3) what is the best way to add a blower but still have the ability to have an ash door

Thanks for your help