Gargraves are good switches for railroads on a shoe string budget. Just use the LH Reg. and RH Reg. as a base minimum radius.
Ross switches are not cheep. 50 dollars or more is allot of coin for a switch, and if you need 10 or 20 of them, it can set you back a piece.
I bought a bunch of used gargraves and learned the newer ones are better. The down fall is the frog. Most engines will pass through it like a car going through it like a big pot hole. Weaver freight cars with plastic trucks and large flange wheel sets hate them.
Ross is a superior switch and I have been slowly updating my layout with them, but do not discount the GG's as a low cost temporary stand in.
