Happy New Year!
... so is that 2W on the schematic a typo I hope?
Possibly the schematic say 350v >4.7k > 275v, which puts it at 1.2watts? Hard to read.
lots of people have built the d-la2a with the sowters and the edcors. neither have much similarity with the original iron. i would definitely say to include an option for the edcors since they are so inexpensive and work okay. lundahls are great transformers, and compact, but pretty expensive.ed