I am really impressed with what you are doing. I've been on an Fw.190 kick myself as of late. I found some hypodermic metal tubing that will allow me to replace the model kit's molded wing guns. I paid $2.40 for 10 six inch pieces (just need to cut to length). Heck of a lot better than paying $10 for a few pieces that are pre cut!
Can you tell me where did you find the Tally Ho! resin wheel well set? That is exactly what I have been looking for myself (just didn't realize that it existed in 1/72).