I have a Richmond 5-speed that shifted hard but I always thought it was the Street-twin clutch . I pulled it and took the gears to Liberty's and had them faceplated now it shifts like butter at 6500 RPM. I have done the mods outlined in the link Andy mentioned to few Richmond transmissions and it makes a big difference in the shifting. The good lube like Penzoil Syncromesh oil works well too and stay away from synthetic lube because it doesn't let the syncro rings "grab" the cones on the gears.

Gus