Superworm,

Yes, the instructions call for dowels to be drilled into the firewall, but the dowel is only some very thin made of somekind of hardwood. Also, the instruction is recomending 3 dowels at each side of the engine box. This pretty much translate exactly to your recomendation. I will also attach some triangular stock to the corners. Thanks for the advice mate. Considering this is only my second kit ever I do need all the help I can get.

I keep progressing with little bits and pieces on this plane whenever I get some spare time. However, I need to get my filthy hands on an incident meter so I can go ahead attaching the stab inorder to move on building the balsa turtledeck...