What engine did you have in it? I've seen 5 of these fly locally. All were essentially stock, with a few minor changes. Three were powered with the LA .46 and two were converted to electric. So far I don't know of the firewall failing on any, but one of the "gassers" has seen lots of air time and is getting fuel soaked, so it could happen.
There have been a couple of magazine articles on the Score, where the builders have reworked the front end, in some cases considerably, to stand the forces of heavier and more powerful engines. I've been flying mine with a ST .60 the past season. Obviously the front end has been totally reworked. It added lots of weight, but I still need 2 ounces of nose weight to balance.
I have doubts about the stock firewall's ability to handle anything beyond a .46 (maybe a .51). If I used it, I'd probably peel the covering back 3 or 4 inches and glass the whole front end, then recover it. Of course the more mods you make to these things, the less of an ARF they become.
I've flown all but one of the local Scores. With the LA .46 they come in at 67 ounces, give or take a couple. In mild weather conditions and on 15% nitro, they seem to fly OK. With trimming and practice you can work up to a decent pattern. One of the electrics was upgraded to a much more powerful motor and is a handful (at least for me), but vibration is less and fuel soaking is never a problem.
Mine weights 5 pounds, but with a strong ST .60 it flies much better than you might expect for such a heavy model. Unfortunately, the ST .60 is a gas guzzler and under the new rules I must use .021" dia. lines.
In spite of it's shortcomings I see several pluses for the Score: the price is right, it's take-apart in stock form, it goes together quickly (if you can resist making lots of changes) and is a decent flier. If plans or a construction kit were available, it could be built into a very competitive plane. Regards, EWP