I had that same kit. It is a beautiful plane. Inmost I beam builds, the fuselage is done first as it is part of the support for the wing. The LE, TE and main spar are all held by the fuselage and the tip jigs, which in most cases is cut to be the out side ribs. Build it upside down, leaving out the ribs in the landing gear area.. The top and bottom blocks are shaped during the fuselage build, but are NOT attached until the wing and stab are installed. Be sure to install the flap.elevator horn before installing the TE.. Cover it will silk if you can find some. I do not use monocote type covering as it will let the wing flex in flight, You do NOT want that. I have seen some covered that way and they seemed to fly OK, but I beams get their stiffness from the cover, not the structure under neath.
I found my Argus did not turn as tight as I wanted compared to an ARES. It could use more stab/elevator area in my opinion,, But....
As an added note, I have built 11, I beam models. Most were Billy Werwage designs. One, not one of Billy's designs, was an F8U for carrier profile. I am building a Juno right now...