Hello. I am working on a backpack blower that I uncovered in my local community compost pile. After much cleaning, it looks to be in decent shape but has no spark. Early research seems to indicate that this is a BR 320 or 400 or similar. I plan to post pictures soon. All of the replacement coils I have seen available have the secondary wire coming out were the frame is so they won't fit. Finding the proper method to check what I have, finding the proper coil replacement, and verifying the correct model number is what I'm working on now. I'll post questions when I get the pictures posted, but I would also like advise on how to get up to speed on Stihl repair information and resources. Thank you for any help.