Used RR GC with Titanium Halo, 13 mm x 100 mm, ~1.7 oz (49.3g) weight handle today and it worked great for me and it's my longest handle. Next shave will be something with 85mm and it will work just as well so I guess I'm still too much of a noob to figure this out. At this point everything I use (razors, blades, brushes, soaps, etc.) works really well for me.