Looks great so far.
There is one small problem though, the part you cut out off of the a-pilar and roof should remain on the F355.
There is no body line on the 355 there like there is on the 348. This resin body was created from the Fujimi body, and that was not corrected before casting.
Many who have built the coupe have corrected that part, here's the pic from my inprogress build showing the filler there.
I look forward to seeing the rest of your build.