RE: Sig Somethin Extra.
definitely a good kit to build, it goes together like a dream. One modification i have made, i fly from a (relatively poorly maintained) grass field and as a result grass would catch on the tail wheel and rip it out. I repaired it several times before deciding to put a guard in front of it, all that it requires is a nail with the head taken off set in a pre-drilled hole just in front of the tail wheel. This is of course if you fly from a grass air-field! good luck!