Hi badgas. Yes, I am on that site under texasguy. I tried that name here (as well as few others) and each time it wouldn't accept so I got a bit frustrated and ended up with "thisismyname" and of course, it took it. lol
I gave some suggestions on your backfiring issue......best of luck.
Your panels are excellent.
We start construction this week on a 40x60 shop weather permitting - poured slab about 3 weeks ago. I've done a reasonable job collecting stuff to fill it up, but anticipate I will have a bit more room. The texaco letters will be the top of a "station storefront" display which will be built in the shop. The shop and also a home gut/remodel we are doing will unfortunately delay the F5 build some but that is what I am most looking forward to.