Apparently the little nut on the top and the big yellow nut has fallen out. TO make matters worse I noticed a green wire has been cut off by the recoil device. It seems that Tamiya knows about this issue, as seen in other threads, and refuses to fix it and builds the same crappy mechanism. Very shameful that anyone has to even make mods to the recoil mechanism in the first place. Hopefully Tamiya is reading these threads and understands that the amount that you pay for their products does not excuse such bad attitudes toward customers.