The large inductors are Mundorf and are 14 gauge I got them from Parts Express as Parts Connection, where I got the resisters and goertz inductors, ( the small ones ) as they were out of that size. The goertz are 16 gauge.
Danny carries foil inductors, but I believe was out at the time I ordered the kit.
Yes I’m going to ground the resistors as I did on my Super7s X-over.