i recently flew the R8 on the EVO 4-line bar and it seemed to work quite nicely. i was on a 9m in flat water with winds in the12-18mph range. not until the wind dropped to 10mph was i unable to ride with no trouble.
i stopped riding as the wind dropped as i was called to duty for helping my wife get up and going with her ride. i would have liked to of tested it a bit more with the low wind, but i was satisified with the performance of the 9m.
this was the first time flying the Rhino for me, so i have nothing to compare my 'results' to. i did not drop the kite so i cannot comment on relaunch in this configuration. however, i can't see that it would be a problem.